I'd say whoring has way more risks, especially if you're poor, abused, or desperate, which most whores are. If you work under a pimp or madam, you're at the mercy of a capricious boss who is not above beating or killing you. If you work freelance, those same pimps and madams want you dead for stealing clients from their businesses. The clients themselves can get really creepy, abusive, even murderous. Whores are convenient victims for many assholes with dangerous fetishes and serial killers. That doesn't even include all the normal dangers of poor living.Whoring is only high risk if the whore in question either won't or can't have her customers use condoms when they fuck. Comparing the mental trauma that comes from being in combat with the supposed trauma that comes from exchanging a service(in this case, sex)for money is almost as dumb as thinking prostitution and porn should be illegal in the first place.
All that stuff can be very traumatizing, PTSD worthy. I wouldn't be surprised if even a "normal" and "consensual" exchange of services is traumatizing because you make yourself vulnerable on demand for a person you're not close to and may even loathe.