re: Why is 'horrific' bad, but 'terrific' good?

Didn't Boris Karloff bemoan the 'horror' moniker in relation to his genre of films? Likely because the term horror used to be associated with a certain repugnant negativity, like 'the horrors of war?' Whereas the term 'terror' had a somewhat cleaner connotation, related more to spookiness and 'fright' than repugnance?

I seem to recall reading something about all that one time. But the term 'horror' caught on, and became the prime term.