That comment didn't claim it was an SV creation, it can be read as SV made it easier and more popular so it made real estate more of an investment in general.
Perhaps fractional ownership was used in limited circumstances before, but some tech co thought they can make it mainstream and didn't stop to think if they should. Cue unforeseen consequences.
I mean... sure, a silicon valley company is offering fractional ownership. I don't see how that supports silicon valley making housing more of an investment. But, sure, dunk on a common boogie man.
Kinda like ClosedAI. Let's do this because we can and it's profitable (shareholders) and cool (software engineers). People lose jobs? That's just life man, I mean we do get to keep ours so...