as far as I know being able to control breathing heart rate and reactions to stress (what the gaol of neurofeedback is for) is good for everyone regardless of if they have a mental problem or not.

Everyone experiences stress of some form or another be it on the home front, in work situations or in mental and medical situations. so I personally believe everyone can benefit in some way from using it.

As for professionals I have yet to meet one that tells a client not to think about their breathing and so on to calm themselves.