What’s he rehabilitating? I can do everything I used to, except I can’t do it for long or repeatedly.
Or well. That's another thing that is never part of the discussion.
I could technically do a work day. Maybe even a work week. Just don't expect me to deliver anything. I can be there. I can make it look like work, but both the performance output and quality would be atrocious. And it would fall over time, to the point where I would no longer be able to be present, but even the very first things I could do would fall well short of my normal performance, let alone my best performance, all of which is far below what any employer would pay a salary for.
This is usually what they lump under 'perfectionism'. We expect to perform at a normal rate, with enough left to live at least a quiet life. They think our expectations are that we expect to perform super-humanly, or something.
If I want to go swimming, running or weightlifting I could. I shouldn’t, but I could if I wanted, which I certainly do not.
Another thing they are clueless about. It's a common 'gotcha', or at least they think it is. "What if there were a fire? Would just lay there?" Depends. There have been times in my life where, no, I would not have been able to. Other times I would have, but if I'd needed to run, then no. Most of the time, I could do those things, and you know why? Because I'm not actually deconditioned. In fact, aside from being underweight, physically I look fit and lean.
But performance would quickly degrade, eventually fall to a standstill, then I would end up in a state where, no, even if there were a fire in the freaking room I wouldn't be able to move away from it.
All of this has been explained by millions of people, but somehow it's all OK to just say "well, you're wrong" and not think about it any further. The same people who would scold most people scoffing at depression saying you could just tell sufferers to pull themselves together and stop whining, they'd lump us along with that, and still find it OK to scold us for similar reasons, because it's not quite depression, just something like it, or whatever.
Never have to justify anything. No system can succeed in those conditions.