If it's a paid app, I've already decided that it's worth money. If the app offers enough value for me to pay, then it offers enough value for me to learn what I need to learn.
[1] excluding open source - sure they want me to use it, but that's more like "here it is, use it if you want it". My expectations there are very different, particularly since I can often change things if it doesn't quite do what I want.
That is a risk from this attitude. I'd wager that the savings from not ploughing through the dross outweigh the benefit of the few good ones that might be missed.
Especially considering the better ones with issues will hopefully come to our attention eventually by word of mouth (so we don't miss them, we are just a little late to the party), or attract competitors that fix those initial problems (or they themselves resolve those problems, which we then hear about through word of mouth and other sources).