Your entire post is conjecture.
Where as, releasing on steam being a loss in profits of catagory 1 customers is a hard fact. As well as, the corresponding "bad sales" in all other catagories.
Steam is like youtube, if you are a nobody, don't expect steam/youtube to do anything for you. You are not about to appear on the front page or in any of the listings even for a moment, unless someone is already looking for you. In that case, they'll find you on humble, gog, epic, etc.
People like steam because everything is in one place, because it's a monoploy. But while it may have been good for the developers it allowed on its platform in the past. In this age, of the steam greenlight, its not going to do anything for you as a developer. Except cost you money which you have to suck up because your fans "Have all their other games on steam, etc", basically the things being said about FP right now on that reddit.