The original superhero costumes were designed to be drawn by a guy who had to hand draw 32 pages every month. Draw a human figure, add a few details to convey a leotard with an icon and boots along maybe some gloves and a cape and a mask/headpiece. Each frame in the printed version is like 5 by 5 cm or so.

In live action in most cases this does not work so well when you can make out fine details. Adding a bit of texture is generally a good thing.

Yeah, sometimes it makes sense. I mean I wish we got more cases like Peacemaker whose outfit is pretty much like the one he has in the comics: