Actually yeah
Because niche markets are generally carried by word of mouth and quality of music , so it doesn’t make much sense to dump a huge budget into promo
Something very mainstream has tons of competition and people trying to take off , so promo sets them above each other
You said if the mixtapes loosies and singles weren't hitting you don't get an album. She got an album without any of those and 0 buzz.
Also didn't say anything about huge budget promos, but still you got low budget labels like Dreamville who release their artists albums.
Desiigner actually did put out other songs that had some traction so theres really no excuse as to why he didn't have an album release.