It is a strange and somewhat recent phenomenon, to associate variety with fun (in gaming). Some folk clearly aren't interested in repeating something, despite associated rewards.
Brought FF1 NES cartridge to a friend's house as a kid. Friend said, "Look, I can win just by pushing 'A.'" Clearly no concept of the broader picture, incremental progress (to be fair he was like 8).
I went that route during my 20s, playing Halo and WoW with a ferocious intensity. I never went CoD, and I calmed to my norm, returned to playing empire management, building, economy simulation, and yes, cockpit simulator games.
Of course, we see this in life, as well. Gaining age and wisdom often leads to long term planning and follow through, grinning all the while.
Your Hutton Syndrome is known, perhaps in yesterday's parlance, as maturity.