Fair enough, very understandable, but you're gonna have to grind it out without Specator mode etc. Every other competitive title had to do it that way too, nothing starts out as a giant esport (or at least not usually, some games are made with that intention from the beginning, but that's only in very recent years). League, Call of Duty, CS:GO, Starcraft and especially Smash all started without company support when it came to the competitive side of things, but the community built itself up over time. Splatoon can totally do it, you're just gonna have to do it without a Spectator mode most likely.
I could be completely wrong, and maybe Nintendo will add these features you're requesting, I just feel like it's unlikely. Through hard work and effort, like the stuff I'm seeing EndGameTV and other well designed/run tournaments do, you'll be able to gather enough attention where Nintendo sees it as beneficial to add those type of features to Splatoon. ^^