As a default I am calling the flop here and reevaluating turn. When you don't really know how he plays any part of his range vs a flop raise and you have a medium strength hand - your raise doesn't accomplish anything.
Its not a raise for protection because you're not actually protecting against anything, you're just bloating the pot when you don't know what to do on a lot of turns and rivers. Yes he has draws in his range - but outside of some gutshots that you crush he doesn't fold any of them.
Say he calls the flop instead of folding. Turn is K
- what do you do? Keep betting? Then river is 4s.
You:
a) shove and he folds
b) check fold
c) check call (but it doesn't sound like youre prepared to do this)
Spoiler
Villain shows Q
6
And thats even if you are betting for value. Do you kinda see where I'm going with this?
Basically the cliffs of what I'm saying is that it's perfectly OK to call down marginal strength hands on drawy boards. If you raise, have a plan.