Rather than call content creators "lazy", just chalk it up to "Shit happens". I don't make mesh stuff (yet), but I'll sometimes forget to upload a texture, or attach something to the wrong point. Most of the time I'll catch the mistake before anyone buys the item, but there are times when I'm sent photos of awesome suits I make, and one panel of the coat tails is grey, or something stupid like that.
You see, some of the content creators out there are going all-out to release things and keep up with things like fairs, hunts, and god knows what else. Mistakes are made, and the world ends for about five minutes.
It's not laziness. It's all LL's fault. How about them apples?