So this here is why when people say "there's no nuclear industry conspiracy" I call bullshit. There absolutely was a nuclear industry conspiracy, and that conspiracy was to produce reactors that are complementary to nuclear weapons programs.
Part of the draw of thorium and some other options is that are anywhere from difficult to nearly impossible to weaponize, but they were ignored because they didn't support the Arms Race. The narrative and the precedents were set around a losing strategy.
Not unlike how some people think that the Space Shuttle fucked the space program, because it elevate pilots above progress. Neither is as simple as that, but these choices had huge and long lasting consequences, and I wonder where we would be if we had decided not to choose and we had pursued both.