For decades they have said it's ok to seek professional help, but it is always with the suggestion that you need to be suspicious of it.
*** w75 4/15 p. 256 Questions From Readers ***
So, while Jehovah’s witnesses do not categorically rule out the possibility of treatment by doctors specializing in emotional or mental problems, if a Witness does consult such he should carefully scrutinize any treatment recommended. He should never forget that keeping Jehovah’s laws works toward his mental health today and everlasting life in the future.
The persistent tone here is that it is permitted "if you really must", but be careful (Why? Of what?) and really, being a good JW should be good enough.
It would have been so much kinder to say "Elders can give only give you so much support. For medical issues you should actively seek assistance from those qualified to do so, including doctors and mental health specialists."