The X-Men have always been forced to juggle their incredible powers with a level of restraint. In a world that hates and fears them, the mutant heroes have always relied on this core ideal to keep from becoming too dangerous or terrifying for the world at large. This has largely been shown to be for the best, as embracing darker paths can lead to far worse results.
Source：https://www.cbr.com/xmen-what-if-jean-grey-magneto-dark-direction-marvel-comics/
