> In my opinion the first priority of code review should be to prevent mistakes in the code at hand

I disagree. The first priority of code review is WHAT problem is it trying to solve and does it actually solve the problem.

If it's not even solving the problem correctly, pedantic nitpicks are inconsequential.

Oh yeah I agree, when I said mistakes in the code at hand I was considering a buisness logic bug/failure to 100% be in bound.