people almost certainly said this exact thing about computers and the internet. that does not necessarily mean that VR will go the way they did, but it does show that just because it seems this way now does not mean it will be this way forever.

facebook and Zuckerberg may be unethical monopolistic robber barons, but unlike some of the other big players in the industry, they're not incompetent, and they never have been

I would guess that they believe the VR industry is awaiting a critical mass of adoption where, like computers, then the internet, then social media, it will suddenly go from being a techy niche to a viable alternative platform for society. presumably they're gambling that the negative anecdata you're reporting will reduce as the UX improves, and I personally think they're probably right