Well, a girl could easily want to do this on her own. The job might be degrading, but she can make several thousands every week. Also she suck dicks with condoms, so she will be used to the taste. Of course if she is forced to give all her money to some scumbag pimp parasite, then that's another story. But if the girl can be independent and keep the money she makes, I don't see what is so bad about sucking dicks to make a good salary.
Lets be clear, I would be VERY surprised to find an SP pulling in "Several thousand dollars a week " , independent or not. The body and the mind can only take so much and for the clients we see a girl earning $ X for seeing us and automatically do a calculation that will bring them $ XXXXXXXXX/ week , it really doesn't work like that. Yes some do ok and others sit around an agency location watching TV all day waiting for a client to show up.
I as a man and a client in this hobby am actually offended that you would make a comment like "I don't see what is so bad about sucking dicks to make a good salary" ! These girls see fat, ugly, hairy, smelly, disrespectful (like you ) men day in and day out. Their personal lives suffer as a result, the lack self esteem as a result . Do not ever forget these women are human beings and they deserve your respect, they are not objects to be used then discarded, before you make a comment here understand that there are reasons that these women choose this life,respect them and treat them well.