This really made me laugh (not horribly or anything) because my MC is a total hillbilly nomad who lives out a boat. His clothing choice is Limited with a capital L and if he read that post he would be absolutely baffled.
That aside, I can understand why you would believe that (as artists) having the creative license to formulate outfits for characters and not doing it would be a massive loss, stylistically speaking. At worst is a display of total laziness right?
But then again, I don't think you're looking at this this right way. For example, I'm a modern woman who works and keeps a wardrobe, right? I'm not travelling anywhere or fighting anyone or doing anything outside the daily routine, mostly, and I have maybe five outfits I rotate on the regular to suit those general activities. I have it really easy compared to most characters and even I can't be bothered to play around. Not only that, but I don't have the space or money to expand my wardrobe even if I wanted to.
Looking at it that way wouldn't it be totally daft for my hillbilly boat dweller to have a fantastically vibrant and varied wardrobe that reflects his mood for the day? I'm surprised he's even dressed at all- I'm sure naked would suit him just fine.
My point is, not all characters and not all people IRL have the capacity (financially, spacially, enthusiastically) to have an expansive wardrobe. The fact that this makes it easier for artists (and that we play on this shamelessly) is totally fair play.