So if you don't get it, most likely you'll get a case of covid (70%+ chance most likely if you're participating in society). There is no "long term" knowledge of what covid does yet either? How do you know that even light covid doesn't stress the heart muscle, lungs, brain, etc years down the line? You don't.

So since the hesitancy is about "we don't know the long term impact"... then I guess these same people need to avoid covid for 10 years too if they're worried about "unknown long term effects"

But I have evidence that it's good in the short/medium term. So my decision has good short/medium and unknown long. His decision (assuming you will eventually get covid), has fairly negative short/medium and unknown long.

Weight those and run the math and then tell me what the optimal/logical decision is.