But DO they like what they like? Or are they just addicted to what was deliberately made addictive?
I played Destiny for months before I realized I didn't actually enjoy it, and had just gotten locked into its addiction loop. Same sort of goes for GTA Online once I started grinding for money to buy yachts and Tron bikes. I was able to pull myself out of both games, but plenty of people get trapped either through lack of self-awareness or lack of willpower. It's what the people who make those sorts of games explicitly depend on and design around (it's the same model subscription MMOs used to use to keep people playing - and paying).
A lot of people need help getting off drugs or alcohol (if they even can), and it's not really all that different. Gambling addiction (whether in video games or just involving casinos/bookies/etc) isn't directly chemically addictive, but from a biochemistry perspective you're still getting addicted to the rush of adrenaline, endorphins, and other neurotransmitters. You can still get that thrill (and suffer withdrawal from it if you ever stop) even if the act itself makes you completely miserable.