I always liked the idea that Batman and Superman both were like, a 10 out of 10, respectively on the scale of 'skilled hero' vs. 'powered hero,' while Diana was not as skilled as Batman, or as powerful as Superman, but was better balanced than either of them, being like an 8/8, with much more raw power than Batman, and much more combat skill / training than Superman. But yeah, that argument falls flat when others are insisting that Diana has to be 1/1 equal to Superman, for whatever reason.
Same with characters like Vixen. I love that she's vastly stronger than Batman, able to channel the physical strength of an elephant, or even a blue whale, but others are insisting that she has weird alien 'animal' powers, or can channel the strength of 100 elephants, or the proportional strength of a mantis shrimp, or some other (IMO) unnecessary nonsense like that. Being as strong as a whale is *plenty* strong, IMO, and not every super-strong person needs to be compared to how strong they are compared to Superman (who, honestly, breaks the bar, and should serve as a comparison to *no one*). In fact, I feel like limiting the characters raw power opens up the number of stories available to them, and the number of threats / challenges they can be put against.