Yeah I hear you HM there are guys who think the women should do anything we want because the customer is always right.
In this case it sounds like the OP is a young guy doing a bit of research and surprised to find that some SPs won't see younger guys. Based on posts from him he seems like he is trying to learn the ins and outs..... more than raising any issue of discrimination despite his language.
Think it is easy for guys to forget that women take precautions to ensure that they can provide their clients a good time without compromising their health, safety or business while feeling comfortable about what they are doing. This is more directed at the OP or general readers than you (HM).