Sure, but you can say the same thing about electric cars and smartphones. Both have had several "failed" attempts, and it wasn't until the technology was mature, cheap and accessible enough that they reached mainstream adoption. There's nothing to say that the same thing won't happen with XR.
If we consider transhumanism as something that's likely to happen, then XR can be viewed as a stepping stone towards that goal. In that sense, it could eventually become as ubiquitous as smartphones are today.