Shawshank bombed. Forest gump was the biggest movie of the year (about the same as the lion king)…
Which one was better? Doesn’t matter…Forest gump was the hit. Hollywood likes that. So does Wall Street.
Did we really just compare the #1 rated movie of all-time (per IMDb) with <checks notes> the #11 rated movie of all-time? The "entertaining" one succeeded because that's the one that always succeeds. The masses (writ large) are always merely seeking to be entertained, or even worse as I hear often these days, merely looking for something to "put on in the background".
Movies that seek to do anything other than entertain are largely ignored by the masses, and therefore by your definition can never be good. Entertaining tentpoles from the last few years did their job (see Gutman's list), but failed to penetrate people's awareness/existence.