But honestly, how many in crypto really care?

I fail to see why people "caring" makes any difference to the reality of the situation.
Either decentralization is valuable and necessary, or it isn't.
You already understand full well why Extranets and Enterprise Blockchain are not a thing.
Big Tech making a splash doesn't suddenly make Extranets a viable business model.
It very well may be the narrative of the next shitcoin casino, but those things come and go every 4 years.