5e's greatest strength is its' simplicity. A player who's never touched a TTRPG before will have a much easier time picking up 5e than a more niche system (although PF2e is definitely not bad on that front, 5e is just super simple and even has resources for absolute beginners)

I don't know what other games you've been playing, but while 5e is simple compared to other D&D editions and other big long-running systems, it's significantly more complex and harder to pick up and start playing than the vast majority of indie TTRPGs, many of which have rulebooks with under 30 pages.