Even if risks are under-reported (plausible, but unlikely, given the amount of scrutiny), it’s definitely the case that the risks from getting COVID are still not fully understood. Long COVID is a major issue that is still under investigation. So by your own metric - “highly reluctant to try the new possibly risky thing” - the vaccine is important. Because “the new possibly risky thing” in this case is getting COVID. You definitely don’t want to “try” that.
Even if risks are under-reported (plausible, but unlikely, given the amount of scrutiny), it’s definitely the case that the risks from getting COVID are still not fully understood. Long COVID is a major issue that is still under investigation. So by your own metric - “highly reluctant to try the new possibly risky thing” - the vaccine is important. Because “the new possibly risky thing” in this case is getting COVID. You definitely don’t want to “try” that.