There are plenty of mobile puzzle games that look simple on the surface yet get insanely difficult at the highest level of play, requiring an understanding of their mechanics on a similar level to console systems-heavy strategy/SRPG/puzzle/dungeon crawl games. The cutesy designs disguise this. Similarly, there are plenty of AAA console games that offer very little actual challenge at the standard difficulty level and can be completed through sheer brute force rather than an understanding of how to most effectively deal with obstacles.
I play console and mobile games and have run into plenty of mobile games that challenge me after the initial tutorials. My wife plays solely mobile games and, if a game isn't offering any challenge whatsoever, gets bored of them very quickly. The ones she's been playing for years still challenge her even after hundreds of hours of play, but often they need different skills to console games. I could no more play the puzzle games she's poured thousands of hours into at her skill level than she could play g-rank Monster Hunter alongside me. To each their own, the point at which our interest levels cross over is Mario Kart or Snipperclips and that's about it!
The idea that she isn't playing 'real' games is a bit like saying people who play a lot of chess or scrabble online aren't playing real games either. It's easy to dismiss people as casuals because their preferred games don't have guns or swords in them or need 15 buttons to play but they still require skills to play effectively even if they look a thousand times simpler.
