Because 1) people who play badly get trash talked which in turn will make them stop doing stupid mistakes or will make them quit and 2) because you are going to get clapped in the moonwalk by me again
We can talk on the streams, where toxic ppl get banned... I love unibet cuz of no chat, where ppl are threathening to come hunt u down and kill your whole family cuz they lost in a freeroll.
I think this shows quite clearly why there isn't a chat If you search "Poker chat", you'll see a few similar ideas with a longer reply. To keep it short:
1. Text chat is terrible and I don't think we'll ever see that added
2. Some sort of interacting at the table I'd love to see (emojis for instance)