They always do. The main reason graphics drivers are so fucking huge is that they contain tons of game specific patches. Nvidia has what they call “game-ready” updates which are supposed to increase performance of popular games or patch specific bugs.

You’re surprised that companies released updated graphics drivers to coincide with a tent pole release?

No offence but are you new to PC gaming?

Why? They do that pretty much with every major release, especially for demanding titles. People tend to build PCs specifically for a specific game, so the major GPU vendors want to fill that high end need.