As someone who has recovered from covid before the vaccines, it feels unfair to be forced to take the vaccine when the risks seem to outweigh the benefits.
No one seems to even notice the people with natural immunity, we are always skipped when having a discussion about vaccines.
Note that I'm mainly criticising anti-scientific propaganda sold as science, and forced vaccinations, not vaccination itself (in general or specifically for COVID).
That's still not far from 100 percent, and the 100 percent might be substantially more correct than "not 100 % safe" in terms of the impression it gives.
Of course nothing is actually 100 percent, in anything, ever, but sometimes it's practically close enough from an epidemiological point of view that some people probably find it easier to round things. Better than saying that there may be some rare risk of this or that, because some people are going to get hung up on that, and that might cause more harm than good.
Public communication about these kinds of risks is anything but easy to get right.