It probably could. Point he's trying to make is that it very often isn't. Lots of pop music is just snapped to grid. Makes it easier to repeat and swap sections.

I'm not sure his demonstration is 'fair', as in someone really quantizing that track would probably do a slightly better job. But it does highlight the effect of over-quantization. Which happens a lot , together with the 'autotune-the-hell-out-of-it' fashion.

Lots of boring music being produced. But , while it wasn't really recorded because recording was expensive, musicians 'phoning it in' have probably always been the majority of popular music.