"Clark Kent" is a disguise. It's just the name is foster parents gave him but the whole persona around this was just made up to hide the real guy, that is Superman/Kal-El. Please accept it. His powers don't allow him to be "ordinary". I guess that's too deep --okay I play nice . I think you prefer the superficial "he was raised as human being, so he is one. He is a normal guy who happens to have powers".
Kent is "just a disguise", "just a name", based on WHAT? Some of the most shallow comic books ever created?
Clark Kent is someone who already existed. How can he himself suddenly be a disguise for something he created? He is secretly Superman to the world, and he acts the way he does to throw people off that he might be The Man of Steel. Clark can't be the disguise. Even when Superman starts to take over more and more of Clark's life and time, it's still who Clark Kent "is" that is driving Superman. And that's about ten times more interesting than Kent just being a shell that Superman uses to get through the day until he can save people.
I said nothing about him being ordinary. But there is nothing superficial about "he was raised as a human being". That is one of the most powerful and thematically relevant arcs in all of comics, a child who was raised by a kindly couple to be a hero, who taught him to use his powers not because of any tragedy or bestowment of a magic talisman, but simply becaue he wanted to do good, and who continue to advise him after he becomes that hero. There is so much story potential with the Kents being alive and mentoring Clark that it's not funny. If anything, Superman coming up with or relegating "Clark Kent" as a "disguise" is far more superficial, and limiting to the character's potential.
You say "foster parents" like they're just a footnote in Superman's history. That is a massive disservice to the concept of the Kents. For all intents and purposes, the Kents are his real parents. They are what is behind his altruistic nature.
Looking at the Superman mythology, we find that Clark grew up being Clark before he ever, ever became Superman. He grew up with Clark's outlook on the world, Clark's ideals, Clark's hopes and dreams, etc. Now, when he starts being Superman does Clark evolve, does his outlook change somewhat? Absolutely. Does he realize more about his Kryptonian heritage? Sure. Does he occassionally struggle with his heritage, and his powers, and his place in the world? Yes.
But he struggles with these things not because he is Kryptonian, but because he is Clark Kent. If He WASN'T Clark Kent, odds are he wouldn't HAVE to struggle, because the humanity that Kent holds so dear wouldn't matter to him, now, would it?
The proof is in the pudding. He still enjoys being Clark Kent. He still wants to be Clark Kent. He doesn't just go "Ho hum, I will disguise myself and pretend to pine for Lois while in secret, I am Superman and I have no insecurities and am all powerful". God, that's just...that's such a boring take on the character.
For some stupid reason, some of you want this only-drawn from Pre-Crisis Superman, where Clark Kent is the disguise, and the Kents are dead, and Superman can't relate to anyone because he's an alien. When you could have Post-Crisis Superman, who not only is Superman, but is also Clark Kent. Post-Crisis Superman not only has the Post-Crisis elements, he also has the Pre-Crisis elements to draw from as well. Why the heck would you want to choose one when you can have both?
And damn it, people, Bruce Wayne didn't die with his parents, not even metaphorically. He was forever altered, but he did not die.