I know this is pointless--COVID response is largely connected to political identity and therefore not subject to argument, but here goes.
Reasons for healthy, young person (who doesn't feel their own health is in jeopardy) to take the vaccine:
1. The more times the virus is spread from person to person (including healthy young persons), the more opportunity there is for mutation and future variants that may be more transmissible and potentially more dangerous. It may be that unvaccinated people will bear some responsibility for any worse future variant.
2. A fairly significant percentage of at-risk individuals (immune-suppressed people and some elderly, for example) do not have a protective response to the vaccine, so their health depends on low case numbers in the general population. If we accept that 30% of Americans are going to stay unvaccinated, these immune-suppressed people will be forced to continue self-isolating indefinitely or take significant risks for normal daily life. Also, an unvaccinated person may inadvertently put one of these at-risk people in the hospital or the morgue.
3. The vaccine appears to be effective enough to come close to eradicating COVID-19 if were were able to vaccinate universally like we did for polio or measles. Or we could accept a significant death rate, largely but not entirely among the elderly, each year.
Look, I agree that we need to be at home with some levels of risk--we do not need to have zero COVID cases to have normalcy. I will also acknowledge that the personal risk of hospitalization or death from COVID for a healthy young person is low (but not as low as the risk from the vaccine). But even if you have good reason to be unconcerned about your personal risk from COVID, there are still big reasons to get vaccinated. It will help others. It may even save a stranger's life. It will speed the rate that our life and economy get back to full normalcy. It's one of those things that requires a community-minded approach rather than an individual approach, and that's never been a strong suit for us because America is founded on individual liberty--I get that. But please get vaccinated.