I have thought exactly as you do for a long time. Recently a side project of my blew up and it was completely organic. I'm just a solo dev. No marketing budget at all. No PR team.
Made me realize that it's still possible for things to organically get big.
Ambient variety, you know, almost static drone, very niche style per se. Never did anything to promote it in any way. Just released it via my friend's digital label on a handful of platforms.
Never had more than ~100 listens a month, and never expected that to change and earn any substantial royalties.
One day, the friend calls and tells he's willing to pay me some pretty penny, and replies to my bewilderment that just a single track from the whole album blew up, glitched the Matrix and obtained some 10'000s of listens.
I investigated a little bit and found out that the track's title coincided with that of some other, much more popular and promoted band.
So I just happened to ride on those coattails.
Edit: removed extra zero in the number of listens :)
Made me realize that it's still possible for things to organically get big.
It's just way way harder now.