Flushes v. straights

[TaintedRogue]

I can imagine how many times this question has been asked, as I asked it on RGP years ago........Why is a flush considered a better holding than a straight, when it is harder to flop an open-ended straight draw than it is to get a flop with 2 to your flush? Not only that, in some of the instances when you do flop an open ended str8 draw, you will drawing to the low end of the str8, as when you have 65 and the flop come 78K.

If I remember correctly, the answer is that there are more ways to get the nut straight, then there is the nut flush. Such as, 65 can flop 74 or 43. 65s cannot be the nut flush.

Anyone know the true answer?

Thanks,
Ken