“Abba_S, you’re sayin even if I have a positive experience with my therapist and think others can benefit, i still shouldn’t share his name”
One possible problem I can see is that you may consider something to be positive that someone else may can consider negative, so it would still be a problem of loshon hora.
In general, there are just so many confidential and privacy issues involved in therapy, it’s not a good idea to give out his name in such a public forum, especially since you have shared so many details of the case. You might inadvertantly quote him in a way that he wouldn’t want to be quoted.
If you really, really want to give his name, the only way I can see it’s being at all okay would be if you asked him first and let him know exactly what you were writing.
I still wouldn’t recommend it though.