True, and those firms that boast they will do everything including the application are ripping off their truly disabled clients. About half of all applicants (ie. those with real disabilities) are approved without any further legal action. When they are approved, the person gets back pay from the date they applied. Those firms take 30% of that money for filling out an application. OTOH I know an honest disability lawyer (yes there are some) who won't do that. He tells clients to apply and then see him only if they are turned down.
I figured out what was going on after my wife worked there a few months. We were both appalled, but you can’t turn your nose up at any job these days. Eventually the woman lawyer who owned the firm got caught up in her own hubris and got disbarred. Took my wife almost a year to find another job.