My ideal RTS would support delegation of armies, and giving broad stroke orders (hold that area, attack this base, provide air cover), with either AI or human players picking up those responsibilities.
Some numbers: AoE players 16k https://steamcharts.com/app/813780 SC2 players ~100k https://www.rankedftw.com/stats/population/1v1/#v=2&r=-2&sy=... Minecraft ~178M https://activeplayer.io/minecraft/
StarCraft 2: Wings of Liberty sold 6 million, but only small fraction of the playerbase is interested in competitve aspect.
Minecraft is just an online sandbox. Most people will play it like that.
Plus a gamedev doesn't need to take into account what sells, but what kind of competition you have. How will your Minecraft clone exist in market with Minecraft vs how will your M RTS live in a market with StarCraft 2.
There are plenty of people that are happy to play games without having the dream of becoming an esports player as career.