It's because most fighting game players are fucking terrible streamers.

Like SFV being boring to watch definitely plays a role especially with players like Poongko but even when I see the others play different fighting games they're boring as shit.

I remember when DBFZ came out I checked out Jwong's stream and it was terrible. Jwong just quietly talked to himself while doing nothing but grinding training mode with the same 1 minute song on loop for hours. He didn't even read chat he had some other nobody do it for him. And as far as watching someone fight others online why would I watch Jwong silently play someone for hours when I can just do that myself

Say what you will about smash but compare this to Mango's stream and you'll see why no fighting game streamers are nearly as popular. He always throws parties on his streams with lots of drinking and music which just creates a more fun atmosphere

Like I know it can be hard to stream fighting games because you need to focus but there are still ways to create a fun atmosphere and not have your stream be for hours while you grind training mode