Emotional problems often require solutions that work on the emotion level. In my experience, trying to self it yourself sets you up to try to solve it with rationality. But that often does not work, because the problem is not rational in nature.
This is where a therapist helps. It helps you to solve the problem at the emotional level. That is something a person cannot do by themselves. Asking for help is way easier than trying to do it all yourself.
I personally benefit a lot from https://healthygamer.gg/ as a stopgap measure. I still needed actual therapy, but this helped me through the rough times.
To be fair, my father tends to make messages quite incomprehensible by adding irrelevant information all over the place. Sometimes going on for multiple screens while it could easily have been a 2-3 sentence message.
Sadly I think AI would even be worse at picking up what information is important from that. But I understand why people want it.
As for very active groupchats, I am not gonna read +25 messages a day, but being able to glance the gist of it would be awesome.