Even if it genuinely made the object of your love happier?
The essence of all persuasion, manipulation, whatever you call it, is giving others what they want; sometimes knowing what they want better than they themselves.
If they are as cold and calculatingly manipulative as you imply, most people who do PUA would almost definitely have no problem being kind, committing and caring towards women if that worked, i.e. made women happy to be with you.
The essence of all persuasion, manipulation, whatever you call it, is giving others what they want;
Not at all. Consider the standard FUD (fear, uncertainty, doubt) -- it is manipulation, it is clearly not giving the subject what it wants.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.