Who in the hell in the hospital told you you had to be vaccinated beforehand? That isn't standard practice for surgical procedures I know. The covid-19 test a few days before hand is.

Your story sounds fishy. You need to rethink that. Perhaps the lady hard sell requested it and you are misinterpreting or maybe you are looking for an excuse to take it?

And for the record, theoretically the J&J vaxx should be better but it turns out it isn't it kills and debilitates just as many as the other two you listed.

Your short term risk of getting screwed up appears to be about the same as catching covid itself off of the street so if you want to buckle under the pressure of a stern request and purposefully get covid then roll the dice have at it.