Cassie's classified ad on this very site makes no mention of the fact that he's biologically male. Given that this forum is here for people looking for information regarding the characteristics of service providers and the suitability of those same providers, I think it's pretty salient information to let people know that the provider advertising on this site and offering nude massages will be showcasing an unanticipated set of male genitals, and I don't think there's anything remotely disrespectful about advising folks of that. If anything, this advice could serve to spare both Cassie and his client an uncomfortable, even disastrous, interaction.
At no point did I suggest there was anything wrong with somebody preferring the services of a male or trans service provider. Literally, different strokes for different folks.
I didn't say that Cassie being a dude would be unattractive to some people, any more than somebody describing a provider as "chubby" or "Asian" or "slender" or "small-chested" in any way presumes the reader's preference. Cassie may well identify as female, but I'm pretty sure that some prospective clients have preferences related to that, and it's not remotely homophobic to let people know. I can accept that in today's woke world it's considered immeasurably cruel to state the obvious, but it's still the prerogative of any client to seek out or exchange information prior to engaging an SP's services without immediately being labeled as homophobic or disrespectful.
And, not to belabour the point, but if Cassie's identification as "female" makes Cassie a woman, as it seems you may believe, then there can't possibly be anything homophobic about choosing not to engage "her" services, given that of course it would be, by your definition, a wholly heterosexual encounter.