Trouble on fourth?

[MichaelOar]

Failing to reraise on 3rd st is horrendous.
I realize that raising "doesn't accomplish anything but get more money in the pot," and that is the point. Hero is likely to be first to act on 4th st with the likely bettor to his immediate left, so it isn't like he can force the field to face a double bet then. He's got the best of it on 3rd and needs to make everyone pay. I see that a couple people have said that not raising is okay, and I am absolutely baffled by this--can anyone explain the thought process behind just calling?

The fold on 4th st is just about automatic. Sad, but true.

Michael