Risk of covid is cumulative, wheras vaccine is one time risk.
Also long covid is present in 5-10% of infections. For some those are life affecting changes.
Why do you think the vaccine is a one time risk? In the US, you are "highly motivated" in many circumstances to take two doses, and people under 30 are getting booster doses, even though FDA advisory committee members thought that was going to kill more people in that group than help.