Arguing over semantics is not ridiculous at all. Semantic misunderstanding is at the root of many disagreements. In this case, the video uses the term bubble

Arguing over semantics is not ridiculous at all. Semantic misunderstanding is at the root of many disagreements. In this case, the video uses the term bubble specifically as it was used to describe the tech bubble in the late 90s. The video offers a number of cues to suggest this is the intended meaning of the word. There will always be overvaluations and undervaluations in the stock market. That's the nature of investment risk. What's missing here is a widespread pattern. This is like worrying that Xerox was overvalued for their Palo Alto Research lab-- a valid concern for Xerox stockholders maybe, but no concern at all for the rest of the world.