That's actually pretty true.
Its hard to imagine a Superboy story where Clark doesn't know about his Kryptonian heritage - especially if he also hangs out with the LOSH.
On the other hand, I actually wonder if the Golden Age Superman would have operated the way he did if he was aware of his Kryptonian heritage. Its worth noting that both the Golden Age Superman and the Morrison T-shirt wearing Superman aren't aware of their heritage when they start off...and they are also the versions who start off as vigilantes prepared to use brute force to bully the bullies. One can imagine Clark Kent, Kansas farmboy who's been raised to use his powers for good, deciding to deliver some good old-fashioned vigilante justice. A little harder to imagine Kal-El, sole survivor of the planet Krypton, deciding to use his powers to blatantly impose his own brand of justice on humanity.