Cariad People work in their clients' homes (or working in a room in their own home) are vulnerable to exploitation, some subtle, some in-your-face.
For instance, there was a case last year (it may have been in the States) of a young woman working as a beautician in her own home, alone, where someone made an appointment in a female name to have a bikini line or a Brazilian depilation. What turned up was a hairy man, who was very insistent that she not only perform this service, but do it while he/she had a tampon inserted for "her" period. when she said that was not what she had been expecting to do, he suggested that a different beautician who had experience in giving this service to trans women (without damaging their family jewels) would be better, he became abusive and told her he would report her for a hate crime and put her out of business if she didn't comply with this odd request for free AND pay over a large sum of money to him for keeping quiet. She did the reporting! and with the publicity the case received it came out that he had done the same to several beauticians - all of them young and just starting out in a small way in their own homes and afraid of defying him. He wasn't even genuinely trans - just after a kinky thrill and money.
There is always the possibility of a client or patient thinking that the services provided while alone on the treatment couch or the make-up chair in the company of a lone woman include sexual ones. GPs and nurses know that very well, and also the possibility of being falsely accused of abuse themselves. If they have gone to the trouble of booking in the knowledge that she is alone, their sexual preferences might be unusual and not generally welcome.