A woman who has sex for work would be very concerned about doing so safely. She is likely going to know about STDs and pregnancies as well as how to prevent them and how to deal with them if/when they come up.
She has experience in setting expectations, limits, and breaking off sex when she needs to.
She is going to have more experience with the human body, what’s “normal” physically, what warning signs are for various STDs.
She’ll likely be the least judgemental person for someone to talk to when it comes to sex and sexual relationships.