Which human vaccines have a schedule like the ones they have for our pets? I have never had a doctor ask for my vaccination records or recommend boosters or come close to what we face annually with a lot of our vets. Unless it's for travel to a new place where we wouldn't have had a needed vaccine or a new vaccine (such as the flu shot which changes every year), we don't have to get boosters (at least I have never had a booster). The only exception I can think of is tetanus and then it's only for those who truly feel the need. When we get a shot we are told it's good for life but not our dogs? Something is very wrong with this picture when it comes to our pets.
Tetanus is an important booster and is not recommended only for those that feel the need as it is prevalent in the environment and if you haven't had one in between 5-10 years (depends on where you live, different vaccines are used in different places) you should get a booster.
The other thing is that many of the diseases that people are vaccinated against as kids are "childhood diseases". The protection against things like pertussis, mumps and pneumococcus wanes but that is considered acceptable because these diseases just don't make adults that sick. There are outbreaks of pertussis every single year in the US but 90% of the adults who get the disease don't have any idea because it feels like a cold with a particularly bad cough that outlasts the runny nose. In the past few years a new pertussis vaccine for adults was approved for those adults in contact with small children, but the assumption is that protection will wane and people that want to be protected for their entire life will need regular boosters.
Kids get MMR and chickenpox boosters around age 12, if they got meningococcus vaccinations at 12 they get boosted before college. Smallpox immunity also only lasts between 3 and 10 years (varies by person and the level of protection starts to wane around 6 months) but we don't boost because it has been eliminated. Hep A fades after 8-20 years but we don't boost routinely because it is only given to travelers in the first place. Polio fades after ~10 years and again we only boost travelers.
There is also a difference in the purpose of human and canine vaccines. In humans, the only vaccines that are designed to protect individuals as opposed to create herd immunity are the vaccines like Hep B, rabies, and HPV. All of these vaccines are a series of 3 shots at carefully researched intervals (one much later) to boost the human response and create a lifelong memory response and the series of 3 shots isn't enough in everybody. We titer test people and continue to boost them every 6 months if need be. There are enough similarities between the canine and human immune response in my reading that I firmly believe that a booster 6-12 months after the initial vaccine will increase the duration of response. Yes, these guys are publishing papers on a lack of change in titer after boosting, but that doesn't mean that the epigenetic changes aren't happening to create longer lived memory responses like what happens in humans. I don't think they are looking at the right markers to know if a late booster is effective and they certainly aren't doing randomized controlled trials looking at titers 10 years after the puppy shots to know if the basic schedule used in everything from mice to humans would also be useful in canines.
As I mentioned, most of the childhood vaccines are designed to create herd immunity rather than to protect the individuals getting the vaccine. Most canine vaccines are designed to protect the individual rather than to create herd immunity. That is a distinct difference, as a student in the health care field my school didn't ask for my immunization records because they knew that the records didn't mean that I as an individual was protected against things like measles. I had to be titer tested for all of my vaccinations because the point of human childhood vaccinations isn't to create immunity in each individual.
As a summary, I think annual boosting is horrible, but the opposite extreme really isn't as amazingly awesome as many make it out to be. Titer tests are not the end all be all in terms of vaccines and immunity. There are other components that aren't tested, and the capacity of the titer to respond to a challenge isn't tested either. In addition by the time a dog's titer (of the quality of its titer) is falling (age 8? 10? 12? 15?), they are old enough that it will be much harder to boost them anyways when an early booster (I don't know exactly when would be best in dogs - I wish people were actually studying this rather than comparing yearly boosters to no boosters) might have kept that titer high and of a higher quality until the end of their life.