east asians generally come with a skinnier frame and more androgynous features than other races
that means the women dont have super wide hips or huge breasts, and the men don't have super broad shoulders or 'barrel chest' torso
all this combined makes passing as the opposite sex easier
I think Thai ladyboys passing on photo is, like any troons passing on photo, heavily depends on camera angle, lighting, makeup and Photoshop. And those that pass really well is a minority, they have lithe figure to begin with. Just as not all Western troons look like Blaire White and that one from Sense8. All the racial dumbshit farmers here like to say is misleading. Most of them don't pass that well irl, lol.
But in Thailand, the troon pool is nearly all HSTS, because the subculture weed out AGP transbians autists. A lot Thai ladyboys don't think that a straight man can become like them, and will never accept them in their circles. There's no practical incentive for straight men to troon out in anyway here, but the very opposite is true for effeminate gay ones. (They have a whole market of dude who are willing to shag them) So we're left with the ones who at least puts in an effort to look feminine, knows how to do makeup and none of the balding head ogres with serial killer smile.
And if anything, in Thailand we're calling the particular manly one 'Buffalo kathoey', those are still flaming faggots HSTS like the pretty ones. They're just blessed with chadly figures, and other manly features that they'll not fool anyone as a woman at all. But since there's also a social class for them on Thailand, no one is stopping them putting in dress. People just know that's a ladyboy and then mind their own business. You'll spot these miles away, and those people are not really delusional about themselves being uwu wittle princess here. They know they're actually men, and couldn't care less about validation.
Yesterday I saw one working as a staff in restaurant yesterday. Basically looked like a 6 foot tall, robustly built man but with tits and bunned long hair. Those are dime a dozen. The pretty traps that you see on the internet, are popular on the internet in the first place because they're pretty and can give people the 'Wow, I'd never know this is a man!' factor.