I'm half joking but if this AI boom continues we're going to see Nvidia exit from consumer GPU business. But Jensen Huang will never do that to us... (I hope)
1. Gaming cards are their R&D pipeline for data center cards. Lots of innovation came from gaming cards.
2. Its a market defense to keep other players down and keep them from growing their way into data centers.
3. Its profitable (probably the main reason but boring)
4. Hedge against data center volatility (10 key customers vs millions)
5. Antitrust defense (which they used when they tried to buy ARM)