I thought of this last night while I was fighting my insomnia.
Victims of child sex abuse do not magically become non-victims the day they become adults. In deed, for some, the victimization may not even start until they are adults. They are still victims. It is a trauma they will grapple with their entire lives, some may overcome the damage of that trauma, but it is still there. Claiming you only hire adult sex workers misses the point: they are still victims.
You can't claim to represent victims when you are making more of them.