Yes, but you don't need graphical drivers to do ML on a GPU, you just need the part of the drivers that lets you do ML. Accelerated graphics are almost completely unrelated. Nvidia can stop offering graphics drivers while still ofering ML drivers and still make a very good living.
Even if they continue offering graphics drivers they don't have to offer them for free. Their main clients are people who do professional graphical and video editing, who can drop hefty sums on driver licensing because they already pay a lot for the hardware and support. Gamers are a tiny amount of their revenue, and over 90% of that tiny revenue is Windows anyway.
At this point Nvidia can snap their fingers and discontinue all their support for the consumer market just like that and won't even feel it. The only reason they bother with free Windows graphics is that Windows gamers still generate a non-negligible amount of revenue by buying the overpriced desktop cards, and the only reason they bother with Linux graphics drivers is because it's free beta testing. The Linux desktop market is a ridiculously tiny population in terms of gamers, but it's a sizable population in terms of QA.