Of course. As I have explained repeatedly, a woman engaging in prostitution is likely not mentally stable, afraid of starving to death through her inability to find other work, or both. To have sex with someone under threat of starvation and homelessness, or to have sex with someone who is too greatly emotionally disturbed to register what they are doing is and always will be an immoral thing to do.
I'm very sorry if you can't persuade anybody but prostitutes to have sex with you, but I fail to understand why your pain at not getting laid is more important than the pain of a woman you just paid to rape. Stop being so selfish.
The same argument applies, to a lesser degree of course, to interactions with strippers or other sex workers not directly involved in prostitution. It's just not ethical to pay someone for a lap dance if they have no better options, and you certainly can't argue that it's not hurting her to give you a lap dance as long as nobody has sex. It hurts a lot to know that the world is full to the brim of men older than your father who think of you as nothing but a sellable piece of ass.