Well I never said vaccines are the only thing to consider.
This world has gmchsnged greatly. Humans live longer than ever before. We have never technology that may be good or bad. We pass on hereditary diseases for a lot longer because we have more kids that live for longer.
The main food people eat these days starting from infancy is sugar. Carbs are a huge part of modern diet while people think fats are deadly. Health care is expensive so people often just choose to forego it. Etc etc etc.
There are numerous things that contribute or detract from a humans life span. I think that is obvious.
Taking two kids and giving one vaccinations and the other not then having them live in different areas is a horribly uncontrolled experiment because the differences between the two would be drastic. Medicine needs to be used wisely but to encourage people to just wait vaccinating when there is no evidence that it will do what you think is scary.
I fully agree with promoting people to learn more and educate themselves. But most doctor's today seem to believe vaccinations are still necessary. If you think all doctors are shills for big pharma and their own self interest then that doesn't mean too much to you. But I'm aware that often if someone works hard enough to become a doctor it is because they wish to give back to the community through saving lives.