This makes no sense. When it works, it gets what its stated aim is, which is sex. That is almost tautological.
You stated that it would work only on women who are looking for sex, which means, on women who intend for the interaction to lead eventually to sex with someone they want.
PUA crap can be used on women who have no intention to have sex whatsoever and spark in them sexual desire. Therefore, whether the woman's goal was to have sex or not, she might still succumb to that.
The fact that she's looking for a meaningful relationship doesn't change anything. She might still hope that that person would give her that. He might or might not.
Not everything goes always according to plan, Coriolis.
If we check the annals, we will find many women with integrity who still cheated once their defenses were lowered, taken advantage of, and they regretted that shit later. We know this can happen that's why it is preferable for her not to put herself in a place where those things might occur. Some women do, some don't.
If you think you have absolute control over all of your decisions, you are absolutely delusional.
*This crap can happen to men too.
Doesn't make PUA methods the right tool for the job if you actually want that sort of relationship.
In general, individuals who do that want a hookup. This doesn't mean there are no exceptions though.
I agree that it is not the best course for someone who wants to actually pursue a healthy relationship where ups and downs occur. It's short-term aimed.