Because Gearbox is now owned by a publisher, and that publisher is NOT 2K. Why would a publisher want to give money to another publisher? It’s simple finances.
If Publisher gets X amount from a sale, and developer gets Y amount, why would Embracer want 2K to take X when Embracer owned Gearbox could produce a new IP instead in which case Embracer makes X+Y?
If you could make a game and sell it through me and make 10 Million, or make a slightly different game under a new name and new IP and sell it yourself and make $30 Million, which would you do?
Your resources are fixed. You can invest your time, money, and assets into either making more 2K published games or making your own self published games. It’s not hard to figure out what’s going to be done. Embracer making more games for 2K is about as likely as seeing Bethesda continuing to make more Playstation games after their current contracts are fulfilled.

