"But you could say the same for most video games:" For games that involve shooting at people, I'd agree. A particular first-person perspective may be difficult

"But you could say the same for most video games:" For games that involve shooting at people, I'd agree. A particular first-person perspective may be difficult to follow but the core is simple and you can pick up the pieces as you go. Quake deathmatches have a lot of interesting arcana to dig into if you want to play at top level, but you can just watch one without any particular skill. From there you can incrementally pick up that shooting someone before the player even saw them is impressive, or that identifying, acquiring, and plinking them with a rail gun in <500ms is pretty impressive. The speed of these things might be inaccessible, but it's not the rule set that is. Most things have a novice-level entry ramp. My sons seemed to pick up the basics of American Football in about 5 minutes when they were 8. It really isn't that hard. They didn't encounter their first "safety" until quite a while later, for instance, but their lack of knowledge of what a safety is didn't bother them. I've been watching for a lot longer and still couldn't simply whip off the names of all the positions or anything myself. Not all esports have that, though. I can say from personal experience though that DOTA is impenetrable if you don't know what's going on. I've been at a local restaurant that was playing some matches for whatever reason. I know about video games in general but know nothing about DOTA. I suppose you could say I understood what it was I didn't understand, but I had no idea who was winning, what a good play was, etc.