Neither is an RTS. They're MOBAs.

True. But these Mobas are descendants og these RTSs. WarCraft 3 gave birth to Dota 1. StarCraft 1 had the Aeon of Strife map.

Sure but mobas are much closer to action RPGs than RTS games in the actual game experience. The origin story as a mod for a RTS is interesting but doesn’t lock in the genre

I guess it wasn't clear but he is talking about RTS games of which your examples are MOBA games and would not apply.

DOTA and LoL are not RTS games; they’re MOBAs.

Those are MOBAs, not RTS.