When sharing just waters down the experience. One guy with an offensive gauntlet and no defense whatsoever. One guy who can do nothing but shield. One guy with an intelligence- and vision-enhancing helmet, but no abilities to take advantage of such enhancements. One guy with speedster boots (and nothing else… jeez, even the Flash can do more than just run fast).

If a single person had hogged all four, he’d be unstoppable.