Yeah, this is true. It's a real shame because the only platform they really could have latched onto is Steam and since it's already got Steam VR it would seem like a no brainer. Of course, that's never going ot happen now that Valve are making their own device.
So, while I agree it's necessary, it's a shame that we've ended up with more fragmentation.
Pitty they didn't get GOG Galaxy support or something!
Thankfully the task of implementing VR support into an engine is actually pretty straightforward, it won't be a big deal supporting the Vive and Oculus. The tricky bit is handling the different input devices but you know, that's always been a pain in the ass