Mostly I'm on board with your excellent comment. A few things though.
However, on average, despite being transformed into uranium, it's radioactive products are on average shorter lived
It's not clear why you believe this. This is not correct. Uranium decays the same way regardless of how it was created.
But TLDR: it's about the same as traditional reactors.
The LFTR advantage isn't a real thing. It's a youtube myth.
There's no real problems with class 3 PWR in an engineering sense. It's safe, it's reliable, it's well understood. America has had more than half of the world's meltdowns - over 100 - and a reactor has never killed a person here. There's a good argument that nuclear power is not just the safest power technology, but indeed the safest technology of any kind, ever invented.
LFTR claims four advantages:
1. Safer. Horseshit. We've never run one and we have no idea what its safety characteristics are. Back in the 1950s we thought PWR couldn't melt down, too. Lars and Ed are just unimaginative; it's not very difficult to think of serious problems beginning with the infiltration tank cracking. Go ask Cavan; he can go on for ages about unconsidered risks.
2. Cheaper. Again, horseshit. We had built 20 nuclear plants for the price we've spent researching this one. Nuclear plants have been made by individual teenagers. You might as well spend ten billion dollars inventing a cheaper $5 watch. You will never build enough of them to pay the delta off.
3. Small modular scale. ***Horseshit***. Nothing in engineering stops anyone from building PWRs at that scale. The reason we don't do it is economic: the structure of the legal overhead from auditing and validating a plant makes them not cost effective. That's why France and South Korea regularly build smaller plants than anyone else - they have advanced auditing schemes that do not require anywhere near as much pointless overhead.
4. Factory buildable. Well, this would be a nice advantage, except y'know, I've been hearing Lars talk about converting a shipyard for more than 20 years, and work hasn't begun, yet. A factory to build regular PWR could be built much faster than that, including replacing Japan Steelworks, if anyone actually wanted to.
They solved a bunch of problems that aren't the problems the industry faces; they built a device that needs a legal and regulatory regieme that doesn't exist; and now they can't figure out why they can't get customers.
And you think those deep brains are going to solve this?
Probably a bit less, because you can basically burn the thorium completely, where with Uranium you still have like 90% of the fuel remaining when you pull it out as waste.
You seem to be forgetting about breeder reactors.