I think a part of it is a fear that these games are going to take over the industry and "push out" the games people like. I think the majority comes from people who made their impression of mobile from a time where there was a ton of shit. Stuff like FarmVille, CandyCrush, whatever shit overly-pay to win game EA was doing was the market for a while. You'd occasionally get something good like The Room, but those were few and far between.
Now we've got Dessert Golfing, Threes, Republique and more doing the traditional pay once and play model and are being really cool experience. You also have Japan redeeming the F2P model with games like Terra Battle, Puzzle and Dragons and Monster Strike. You can find games with a lot interest and depth on mobile, the problem is if you can't get passed the F2P model or have a hard time sorting through all the shovelware that still gets put out.
Now we've got Dessert Golfing, Threes, Republique and more doing the traditional pay once and play model and are being really cool experience. You also have Japan redeeming the F2P model with games like Terra Battle, Puzzle and Dragons and Monster Strike. You can find games with a lot interest and depth on mobile, the problem is if you can't get passed the F2P model or have a hard time sorting through all the shovelware that still gets put out.