The vast majority of people don't care and would never use ethernet sockets, as long as they can get a good enough wifi connection to their smart TV for Netflix etc. then they're happy and most of the time wifi can do that.

It's only really gamers who are likely to consider using ethernet and avid online gamers don't make up a significant percentage of the people who buy new build homes

Which is a shame, because it puts a huge support burden on ISPs. Every time some WiFi interference slows someone’s internet down they’ll end up blaming the ISP and calling support.