Way more than I can try to condense into a post, but it’s not because of any U shortage. Here’s a good starting point:
https://liquidfluoridethoriumreactor.glerner.com/2012-what-is-a-lftr/
https://eic.rsc.org/feature/is-thorium-the-perfect-fuel/2000092.article
There have been proposals for smaller scale LFTRs that lend themselves to distributed generation - many small generation plants near the high demand areas rather than larger ones like we have today which require costly and vulnerable transmission infrastructure.
And you are engaged in one of the biggest fallacies of all time - that a yet unproven technology makes obsolete technologies that work well and have gone through multiple cycles of innovation and incremental improvement.
You are being led astray by a bunch of folks who want more government money to do stuff because there is no source of private investment to do it, and the government cannot get any group of experts to endorse spending money on it either.