No, they are not sick. They are sinners, like the rest of us.
Sin is a choice, not an illness one catches and can't do anything about.
Sin is a sickness, we are all sick, you shouldn’t judge porn stars for making a choice, you don’t know why they made poor decisions, they may have been abused or come from broken homes, you don’t know, it’s easy for one to judge from one’s ivory tower, you can turn your back on their sin or you can try and help, Jesus helps all of us, He does not pick and choose who needs His help, He is here for everyone, if they ask for it, He will help, and I pray for the porn industry and its’ stars because they need His help! Christians are in for a big surprise when they see who is let into the Kingdom first, Jesus said: “The first shall be last!”