That's their price differentiator. It's the reason for their profits. nVidia is now <20% gaming in terms of revenue and that gaming revenue has much tighter margins than the 80% datacenter/professional market revenue which is almost all profit sine 80gb ram doesn't cost $40k more.
So yes it'd be nice if nVidia made it so there was no reason for their $40k AI cards to exist. But they aren't going to do that.
No one's catching up to the topline perf or even power efficiency (Intel actually suck at perf/power right now) but they might be able to compete with raw GPU costs at least. Give us a $2k card with 256gb ram and we'll probably take it over the $40k 80gb cards despite the power efficiency and topline perf that the $40k card has.