mandatory vaccination is the same as traffic laws.
If everyone follows the same laws, we can drive safely. It's about the good of society, not a single person. Since kids can't be vaccinated yet, then it's up to the rest of society to get one so they have less chance of catching it and bringing it home to a vulnerable person.
The vaccination is not 100% but it reduces the risk of spreading it to the 10% who get covid with a vaccine and end up in the hospital.
And the only reason this vaccine was approved so fast is because every single person and entity involved with the development, testing, clinical trials and approval were told "you ONLY work on this until you pass it to the next stage".
as someone who works in clinical trials, the frustrating part of the vaccine misinformation is that the media portrays the only players in the process as pharma and the FDA. the vaccines, as all other drugs are tested at local hospitals who have doctors and coordinators who agree to monitor the patients in the study.
If a research institute who wanted to be a site for the vaccine study didn't respond to the companies with their inquiries within days, that site was not selected.