1 )Not everyone can get vaccinated due to existing pathologies or simply being allergic to some components of the vaccine. For these people it's important to reach herd immunity as it's probably their only defense. Consequently, if people decide not to get vaccinated, reaching that threshold is harder and harder and it will force those who can't get the vaccine to live in segregation/fear.
2) The cost of a vaccine shot (both in terms of money and equipment/personnel needed) is orders of magnitude less than curing the disease. If you don't get vaccinated and you get said disease more healthcare resources need to be allocated to you. This will probably lead to increase taxes or budget cuts in other areas or, more worryingly, you could indirectly kill someone else with a curable disease because there were no resources to cure him/her.
Since vaccination is never 100% effective, your choice increases the risk to people who are vaccinated, as well as those who have not yet been able to receive that vaccine, and those who cannot receive it for medical reasons.
My point is, those who can’t get vaccinated have choices to keep themselves safe, and their decision not to take on those inconveniences shouldn’t result in OTHERS being coerced to undergo a medical procedure. I think it is disingenuous to place agency on those taking no action by skipping the vaccine.
most vaccines are 60-99% effective even if you're healthy and have been vaccinated you can still get sick if the disease is heavily present.
Then the vaccine is not approve for youth below 16 (if I remember correctly)
And what about the 5% not respondinding to vaccination, they don't know that, so everybody should continue to take precautions?
No, I am just saying that you cannot realistically expect everyone to care about your health, so you should take precautions as much as you can, because presumably you care about your health (much more than randoms). That is all.
This only happens is most people are vaccinated, if a sizable portion of the population is not then the outbreak will just keep expanding and will not stop, with the consequences we are all aware of.