Sure, Intel isn't going to be able to sell Xeons for $1k a pop in a future where anyone can go get their chips fabbed at TSMC. But neither is TSMC going to be able to command the margins they do right now if Apple and NVIDIA know they can trot right over to Intel to get a better deal.
To me, the story here is much more "maturing industry is losing its margins" than it is a two-way horse race.
This is what I'm hoping for as well. But there are huge upfront costs (>20b). This will limit the number of potential players.
I found that the cost to build a 65nm plant was $1.2B in 2021[0] which is a pretty mature node and that's still a large upfront cost, and smaller nodes would be even more expensive. So it's hard to say how low prices could fall.
[0]https://finance.yahoo.com/news/bosch-inaugurates-1-2b-factor...
ARM also has a significant thermal and power edge.
Intel is chasing the top, but actually they should be thinking about efficiency.