Great question. In context, I think it falls under the tradition of "impractical sexy outfits" as conceived by modern artists. There was a comic about a decade back, the name is currently escaping me, about a woman warrior who actually wore full, practical armor. (This choice by the artist was taken to be quite radical, as I recall;)

It would be interesting to find out if there is any explanation of this, but my guess is there won't be much material because Wonder Woman's costume has nothing to do with her powers, aside from the accessories, and everything to do will book sales/revenues.

With the popularity of cosplay, I suspect will see even more emphasis on impractical outfits going forward.

I found a pretty hilarious discussion of this topic: Video Game Armor Logic

Great question. In context, I think it falls under the tradition of "impractical sexy outfits" as conceived by modern artists. There was a comic about a decade back, the name is currently escaping me, about a woman warrior who actually wore full, practical armor. (This choice by the artist was taken to be quite radical, as I recall--the fact I can even find a screen shot to post should give some indication of how interested people in warrior woman in functional armor;)

It would be interesting to find out if there is any explanation of this, but my guess is there won't be much material because Wonder Woman's costume has nothing to do with her powers, aside from the accessories, and everything to do will book sales/revenues.

With the popularity of cosplay, I suspect will see even more emphasis on impractical outfits going forward. (Not that I'm complaining!)

I found a pretty hilarious discussion of this topic: Video Game Armor Logic

I understand you are looking for an in-universe answer, and I'm only adressing that in an indirect way, but it's easy to overlook that entertainment and media are businesses first and foremost, and this driver of aesthetic choices is nowhere more prevalent than in women's superhero attire.