I have dated a couple of strippers, and a bdsm domme. In all cases, I met them outside of "work", I had no idea what they did, liked them, and they informed me after the 1st to 3rd date. The relationships didn't work out, although the longest lasted 3.5 years; the breakups had nothing to do with their jobs. By "didn't work out" I mean I'm not married to any of them. They were lovely women and really excellent friends and lovers and I have no regrets about dating them, and I think they'd say the same of me. I've never dated a full GFE or PSE provider, but really at this point it wouldn't make any difference.
If they were going to continue in the business, it would have to be on a condition that she could tell me about her day at work the same as I told her about mine, and that we were both comfortable and had no issues.
Probably more likely, she would be semi-retired but have a few long-term regulars she still saw. I wouldn't have any issues with that. The ex's I mentioned certainly had long-term "fans" and I totally understand the relationship there. It is subtle, and nothing to be judgemental about. My GF that was a pro domme had a live-in slave who would sleep in the closet when I stayed over. I'm probably more open minded than most, but the thing is, if you are open sexually and at all kinky then you let your partner have their kinks too.
The key to me is loyalty. If I know my partner has my back, they are honest and open with me, we can share stories, and not judge, then that is the most important thing whether they are a CEO or an ADM or a waitress. Set our egos aside and not feel threatened and know that this person will be there.