That seems to be your conclusion, which I do share to a large extent. But you’re not looking at my other point: if you really want to, you can start locally and work your way towards international “expansion”. Instead of just reaching the preliminary conclusion - that the world is a BS place and never mind trying.
Look at Tom Holkenborg, from my home country. He started out working in music stores, and playing in (very!) local bands. He was guitarist (and drummer) of a little known band called Weekend At Waikiki, that as luck would have it also had my high school math teacher in it hehe, which is the only reason I know this.
Then he went on and founded Nerve, a little known Dutch / British industrial band. Got signed. Sold a couple of records here and there.
Went on and started Junkie XL, which initially was the name of his band, together with another Dutch musical talent - a rapper named Rudeboy. Brought out a couple of singles. Had some regional top 40 success. They played each and every festival in The Netherlands and Germany. Slaved their asses off. Maybe received some airplay outside of The Netherlands? And that was about it.
And then the Elvis estate wanted a remix. Or maybe he approached them with it. No idea. But when that happened, opportunities opened up for mister Holkenborg. At that point he had already had a heart attack, he worked that hard.
But for some reason Tom wanted to take a shot at Hollywood film composing. And with all the hard work he had put in, he STILL had to move to LA and become an intern over at Remote Control hehe.
This story is off the top of my head and may contain errors. But the gist of it is true. Tom wasn’t rich. Tom just wanted what he wanted really bad and worked hard to attain it. And even he got a “break” (luck?) when he made that Elvis remix that everyone now recognizes the JXL name from. I’ve never heard him say, I’m from the north of The Netherlands, no way I will ever encounter the right people here. I’m from there and I can assure you, there’s noone here
TL;DR I do think location is important. But in the mean time, if moving to LA of London isn’t an option (which I totally understand) maybe try and network your way into a local indie film scene, make sounds and tunes for Slovenian commercials, write songs for local bands or artists, etc. Try and find something that’ll give you some meaningful IMDB resume items - etc. Work your way up from there.