'Most' apps do not get used even once [1] so their user experience doesn't really matter.
Most popular apps are designed for both tablet and phone. The ones that haven't specifically been designed for tablet are usually basic things like Guitar Tuner or Flashlight which don't suffer much from having a phone layout on a tablet.
Sure, you will still sometimes encounter a crappy app which has a horrible user experience on your device - similar to web pages and webapps which assume you have a 24-inch display - but not often enough for users to avoid the platform.
