Well, couple of things.
First, there are quite a few reasons to have local networking that performs quickly. Gaming with local friends comes to mind, as does having your own file server to keep things like movies or project files or just archived stuff off your personal PC's drives, and also on-site backups.
In short, there are plenty of reasons to have a fast LAN, and LIFI would make that more convenient. Because who likes running ethernet everywhere?
First-point-five: Honest answer: I do. I may be paranoid, but I prefer to trust in physical connections. They're harder to take advantage of, by Eve or Mallory or whatever your preferred metaphor may be. (Admittedly most of them are crafted with the Internet in mind).
Secondly, @Dexter_Kane is quite correct in his suggestion. If you are the kind of person who likes to work at the local coffeeshop, LIFI will mean a lot more to you than I. They're already paying for the best service to the Internet that they can get -- which you may not want for cost reasons or maybe it's only available to businesses from your preferred local ISP.
Third, and last, we are (agonizingly slowly) upgrading to a better state. Google Fiber is a great indication of this, and although it's only gigabit, it's a good gauge of the market. If Google thinks they can sell gigabit service for $70/month in cities, that's a very good indication that at least some of the big names in the tech market are finally coming around to the idea that faster internet can be sufficiently profitable.
It's like Logan has said multiple times about .... er, I've never lived in Kentucky, was it Nashville? ... that they have seen a massive growth in small businesses and in their economy after an ISP there started to shape things up. I forget the details, I find Kentucky boring. You see the point anyway, I assume.
(Note that I know next to nothing about the European markets. I'm aware the situation in Canada is nearly as bad as the US, but that's as far as my international knowledge of ISPs goes.)
Shout at the ISPs some more, and maybe more usefulness will come to things like LIFI and CAT6. And whatever is going to replace CAT6, of course. But, in the meantime, yes, I do think there's plenty of reason for these things. Just not as much as there could/should be.