I’ve ridden the TGV and Shinkansen. They don’t go to my kids’ grandparents’ house, but when they do (or hell, even something like the German ICE does), I’ll use them. I’m not anti-train; I am anti-impractical-train.
Today, Amtrak takes 22.5-27 hours to go 642 miles Boston to Columbus, OH. I can drive there in around half the time (likely less once you add the time to/from train stations) or fly there in 1/4 the time.
That’s a perfect distance for actual high-speed rail.
To the other grandparents, Amtrak can get me 657 miles in 18.5 hours to a place about 100 miles from their house. That leaves once per day at 9:30 PM and still leaves me 2 hours drive from their house (which is in a tourist area near the ocean, not some unpopulated area). Another perfect distance for HSR where I can drive there in less than half the time or fly there in around 1/4 the time Amtrak takes today.