There is and never will be a definitive "morally right" answer for all situations. Also death is not the only metric people are scared form side effects that may not cause death. They probably should not be but most people simply cant do the research to "know" the real risks. So most people go by what they are told from someone they trust or they do the opposite of what someone they dont trust says (for example the mainstream media).

In the end the only acceptable "morally right" thing to do it to let people decide. This is how it was before covid and this is how it should be after. Will this lead to more death than enforced vaccination for everyone? Yes, it almost certainly will but that should not be the metric. Its an completely "invalid" argument that would never be used for any other similar topic.