I played a lot of chess and a bit of poker as a kid and got a lot more out of the chess. Maybe I just didn't put enough into the poker but I think I sort of never really got what was going on with ranges and frequencies and sort of just 'played my hand'. Chess really stretched and "if this than that" muscle very deeply in a way I think actually benefited me. I dont think any amount of playing poker without a coach would have led me to any important understanding. Games of randomness are deeper than deterministic games, but I think it's also easy to play them for a long time without even noticing how you could improve.