I remember several discussions about whether or not a certain part of any game can affect other parts when they are unrelated. This goes back to Metroid Prime 2 and it's multiplayer mode. It was an unneeded addition and people rightfully complained, but several others would defend it by saying "it's a completely separate thing, it doesn't affect the single player, just play that". But in the real world, even though the MP mode is indeed separate and you can ignore it, it still took development time, production money and disc space that could be used in the single player game.
The same goes with a similar argument about mobile gaming. 99.9% of it is trash and many gamers like me believe it damages gaming as a whole. But the usual defense is that "console/PC gaming still exists, mobile is a different market, you aren't affected". But that only applies for any new studios that were specifically created to make mobile games. In all other cases, mobile gaming is leaching developers, money and time that could be used elsewhere.
This GTAV leak is a proof of all that. Even though the multiplayer is a completely separate entry from the single player, we see how it got prioritized to the point where the single player game got completely ignored and we had to wait a decade for the next single player entry. I hope people will realize now that things need money and time to be made and these are not infinite resources so every project will affect some other in a small or big way.