Aštra’el
Aštara, Blade of Aštoreth
You aren't getting there is a different between training and strengthening and abuse. Even to yourself, you can push yourself too hard to the point it does become abusive, damaging, and destructive.
What I do get is that there is a particular level of subjectivity attached to the term "abuse", and that if "psychological abuse" were in some way outlawed, many forms of training and criticisms might be twisted into criminal offenses.
I also understand there are forms of obnoxious verbal behavior that might create suffering yet needn't be against the law. Bullying, trolling, "shaming", being an a**hole to people, etc. Not that I approve of these things (or disapprove), but I would rather not see people fined or locked up over petty insults, just because someone was offended and got their feelings hurt, or became miserable and depressed because they let someone's words destroy their self confidence.