The issue isn’t the splitting. There is no fiber to even split in most places. A lot of places in America had their “network” infra built 50-100 years ago on copper and no one wants to pay to basically rebuild all of it.
I happen to live in an area where there are still above ground utilities.
We got >5 gig fiber fast. We have 700Mbps 5G. I literally watched them string the fiber on the poles.
It’s still not shared, but it’s fast because it’s new. Shared would be preferred, but you need destroy + “new” first, and most people are fine with what copper gives them. Shared may even be cheaper but most people don’t think we need to rebuild anything.