Like with fusion, people tend to go wild about how "safe" an untested technology is. Similar claims were made for ordinary fission power early on, which was also called "too cheap to meter". That seems like a bad joke now.
The Suppression Of Thorium As A Cheap Safe Nuclear Fuel
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You watched that quickly 
Did I claim to have watched it? I went by the title only, which is old stuff already.
The uncomfortable fact that some Thorium boosters (like Edward Teller) are unscrupulous fucks doesn't help its case.
https://www.youtube.com/watch?v=c7baTdyHv8g