A random tweet about a concept not being "fundamentally ridiculous" is an awfully low bar to discredit intelligence. Have a look at his blog[0] and let me know if that reinforces your belief.
Besides, if you read the whole thread you'd know he's acknowledging that if we could simulate QC classically, then we'd be able to have more efficient classical search algorithms. It's an if that's likely impossible at scale but not, by definition, impossible.