While this is an interesting point to consider it's not completely equivalent. In short, taking an action that might harm in exchange for a small possibility of

While this is an interesting point to consider it's not completely equivalent. In short, taking an action that might harm in exchange for a small possibility of a benefit is much less appealing than taking an action which might harm you but will definitely bring a benefit. To expand, people accept a level of risk depending upon the benefit they expect to get from it. In the case of the contraceptive pill the user has a clear & definite benefit (e.g. they are very unlikely to get pregnant from the sex they are definitely having). The benefit of the vaccine for the individual is less clear & loosely defined. It's another probability that's hard to know. The recipient might not get Covid-19 and if they did they might not get it badly. So it's a much more difficult benefit to weigh against the risk. The assessment is easier the more at risk the recipient is (hence restricting use to older generations) and on a larger scale, where policy makers can compare that 1 in a million increase to the x in a million that will die from Covid-19. But for individuals, most people are not good at making those judgements correctly.