Lex is still using his mind to build the power suit. If a man can build a machine that lets him stand toe-to-toe with Superman, how is that not embracing the idea of Lex as a believer in human potential? Technology is an extension of the human mind.
Now, if Lex were just slapping together a suit of armor from Apokoliptian tech or something, that would suck. But, as far as I know, Lex built his power suit from scratch and the only alien artifacts in it are the Kryptonite crystals on the knuckles, which is just more good planning at work, since he knows they hurt Superman.
Also, Lex isn't ever gonna use his power suit to become a superhero and make humans lazy by saving them, either. He's built it for one specific purpose, just as he lays traps for a specific purpose and plans contingencies for specific purposes.