system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] Why hasnt Lex Luthor (Earth 1, not Earth 3) or any other genius used the existence of multidimensional technology to their full potential?

Since there are, at times, at least 52 earths to choose from, why not team up with more agreeable metas? why have Earth 1 Cheetah and Black Manta work for you when Earth 17 and 33 versions are more powerful? Or Grodd import troops from Earths for Gorilla City?

There are a myriad of ways to use them... (is it blocked by the Monitors??)
gpt
At least on paper, The DC Multiverse isn't accessed casually. There are only a handful of Metahumans who can either do it inherently (Flash, Vibe, Signal, various magicians) or have it as one of their areas of study (Mr. Terrific, Rip Hunter, Maybe Booster Gold?) Outside of that extremely small cadre, the tech is experimental, unpredictable, and far less available even to Lex Luthor than you'd expect.

 In most continuities involving the crime syndicate, Crime syndicate Luthor only turns his genius to accessing the multiverse as a hail Mary when he's tried literally everything else and every other superhero in his reality is dead. Mainline Luthor rarely has that sort of external pressure bearing down on him- he's never going to be so utterly strapped for goons or cash that he wants to go poking around the multiverse. Especially because there's no guarantee he'll be able to *control* those more powerful alt-earth versions of supervillians if he recruits them.