Even if they do sell aborted carcasses. So what? Is that so much worse than simply throwing them into an incinerator?
That would represent a conflict of interest. If the hospital makes money selling aborted carcasses, then they'll encourage mothers to abort, or even just perform then without asking and lie and say it was a miscarriage.
The world is a dark and lonely place, and it is literally impossible to be too paranoid. No matter how evil you imagine people to be, they are worse.