Preflop dogma

[Dex]

"Always open for a raise."

Say you're UTG. What is the point of open raising with hands like:

KJo (or even KQo)
A9s
KTs
QJs

Worse hands fold. Better hands 3-bet. Then you either miss the flop or hit a flop you like and get screwed. In addition, for something like QJs, haven't you just shot your own implied odds in the foot? Perhaps you would have folded QJo but raised QJs. But what good is being suited now? What have you accomplished?

If you have KQo, do you really want KJo, KTo, QJo, QTo to fold?

Discuss.