bet for value?  Don't think of a flush draw as a draw, think of it as equity.  On the flop you have 70% equity and your opponent has 30%, so you bet and he calls, why wouldn't you bet?  You bet turn because you have around 85% equity, so again you are betting for value because your opponent has 15% equity.

I don't think I am explaining this clearly, let me give it one more shot.

Lets say you raise pre, get called, cbet and get raised on a 3c4c9d flop and you are holding ThTd.  If you know villain only does this with FD and sets what is the play?  The correct play is to fold. Why?  Because his reasonable FDs all have at least 40% equity against you, and his sets have you crushed.  Some of his FDs are slight favorites to your hand.  So if you think of it in terms of black and white, a pair beats a flush draw etc… you will get mad everytime someone makes a flush on you (I def am not happy lol), but if you think about a flush draw as a hand that makes up a range that has x amount of equity against your range, I think first it will probably help your game, and second will help you take the “beats”.