Stupid question?

Hey hey, I'm new here (and new to cinematography in general) and I have a question that I feel is kind of stupid but here goes lol.

What, if any, is the real benefit of using the big square matte boxes for filters vs the standard circular ones that fit the lense? I have a full set of magnetic ones so speed of swapping isn't really a factor I wouldn't think.

Thanks and sorry, newb is gonna newb 😂