If Intel wanted to start now, they would still have a lot of catching up to do.
That being said, once they catch up, the ressources they could put in would outmatch other players, giving a better product.
Also there's the issue of energy cost in the US. Why produce a bitcoin ASIC that can only afford to be run at a profit and ROI elsewhere than the US?
And so it goes. The energy it takes to manufacture products in this country in many cases costs more than elsewhere and is likely more than any tax incentives given to attract business, e.g. the PCB manufacturing company that moved down here to Georgia, largest employer in the county, out of business, electrolysis.