[Fnoord]

Because it only leeches from the collective pool of knowledge / experiments, instead of experimenting and trying different things which could lead to diversity. Some people won't have the time to pull off experimenting though, and it is also possible to get inspired by someone else their deck. It is also a form of jealousy/spite by those who do spend time; as they see other people who spend (far) less time in the game, to overcome challenges.

For me, I am a former MtG player (mostly end 90s), and the game is 100% P2W, as is Hearthstone. I enjoyed the orig. SWCCG a lot as it was very different, but it also was more... weird and roleplayish like. Other than that, Micropose's 1997 MtG was buggy (hehe and put off turbo button to make game speed go down) but at least also somewhat fun, and allowed players to play with old cards for not much money. The only other CCGs which are not P2W are Netrunner and Slay The Spire (inspired by Netrunner and not really a _C_CG but rather a card game with rogue-like element; it does have the arena/deck building aspect to it though!).