Actually this isn't the case. Funding choices matter. And not all technology can get funding. Hydrogen investment for the last 40 years has cost untold billions, and has led to almost nothing. Its has actually delayed real efforts in places like Japan.
Here we have an article asking for investment to find some almost mythical hydrogen that might somehow exists and if only they got money they would find it. Thorium doesn't really need that, we have mines now that produce enough of it that they basically don't know what to do with it.