I recall reading in Sheila Jeffrey's The Industrial Vagina (I highly recommend this book) that an ILO report estimated that the prostitution industry in Thailand holds up their economy by an estimated 2—14% (and this report was from the early 00s, so safe to assume the numbers have only gone even further up since then given how tourism boomed).

I'm a Singaporean who has not spent significant time in Thailand, but am vaguely familiar with its culture due to being a Theravada Buddhist — the overall state of things does seem as sexist as what you and commenters have said. I'm not sure if you may find this relevant, but I recall a monk mentioning that a lot of religious Thai men even don't believe that visiting prostitutes constitutes a breaking of the basic Buddhist precept to not commit sexual misconduct/misuse of the senses. I thought that said a lot.

It's not just white expats and tourists being disgusting; many, many Singaporean men flock to Thailand to be the worst johns there as well — we even have a local pejorative for them, "Bangkok Bros". It is not uncommon for Singaporean men to send prostitutes to male employees when they go to Thailand for work trips and such as well. I've known of women here who have had their male partners cheat on them with prostitutes in this exact situation.

Maybe if you find your own safe circle and niche within Thailand it'll be worthwhile, but I personally can't ever feel at ease in a country where so much of their economic and cultural fabric relies on the flagrant abuse of women and girls. Sooner or later I'd be bound to have rude encounters, in whatever form, with the worst ugliness of humanity that Thailand enables. Even if I'm not directly affected, everything about Thailand's proven reputation of being a free zone for traffickers, pimps, and johns—foreign and local alike—is something that seeps into the fabric of society, in the power dynamics that play out in day to day life, in people's attitudes to things in general. I've never felt comfortable in Thailand (ever since I first visited as a child with my family on holiday) and I never knew exactly why besides a "the vibes feel off", but after growing up and reading more about 4B and feminist literature, I think this would be why. If we become habituated to the water in which we swim in, then a country that enables, encourages, and turns a blind eye to the abuse of women and girl children on such an unparalleled scale is not a place I would ever want to step into long term.

I really wouldn't recommend it as a place to live if a woman is 4B and has better options 😩🙏