To the contrary, I think the people at Marvel Studios do care about power level, insofar as they broadly care about consistency in portrayal.  What they *don't* care about is sticking strictly to the comics, in terms of power tiers.
Which is to say, sure, Spider-man should beat Cap every time and without much trouble. . . in the comics.  Because in the comics, Cap is only peak human, and Spider-man is quite a bit beyond that.  In the MCU, by contrast, Cap is *not* peak human.  He's quite a bit beyond that, in the same way Spider-man is, and has been since his first movie.