Recent data shows 20 percent of mobile games get opened once and never again. 66 percent have never played beyond the first 24 hours and indeed most purchases happen in the first week of play. Amazingly only around two to three percent of gamers pay anything at all for games, and even more hair-raising is the fact that 50 percent of all revenue comes from just 0.2 percent of players.
This is a statistically insignificant amount of happy gamers and nothing that gives you a basis to make claims about “what people want”. I think it just as likely that mobile’s orgy of casual titles is due to simple bandwagon-ism or, in other words, not knowing what people want.