There's no question that a good vaccine does what it's intended to do: stimulate the immune response to produce antibodies. But there's also no question that some vaccines can cause injury and death in some individuals; there's plenty of documentation supporting that as well.
The problem comes in mandating vaccines to those who cannot be vaccinated, either because they are too young or because an immunological condition makes vaccination too risky; those who choose—or whose parents choose for them—not to get vaccinated for nonmedical reasons such as religious or personal beliefs; and those who have been vaccinated but whose immunological response is insufficient to protect them from potential infection.
There are possible deadly consequences to taking the vaccine. The risk may seem small to some of you. But if it's your child that dies or is permanently disabled from the vaccine, was the risk worth it?
Then I cannot understand why we even attempt to develop vaccines in the first place. Smallpox, diphtheria and polio largely eradicated in the USA with vaccines.
All for naught. We should not have done it. Why bother with clean water, either. It is probably a communist plot, too. /s
The things which gives the individual that opts out the chance to do so without consequence, are the others who went before and aided either total eradication, or nearly so.
There are legitimate medical reasons to opt out. An example is an organ transplant patient, who has a lifelong compromised immune system.
But the medical exceptions are few and far between, and a community with a high vaccination rate gives those limited medical exception individuals the safety to presume little risks.
Read about "herd immunity" which should be understandable to people able to grasp science, logic, statistics, probability math etc.