You can, but your eyes see movement while your body is telling your brain you're sitting still, so it can lead to motion sickness. One way to alleviate that is to simply let you teleport from place to place instead.
I'm really curious how something like teleporting in a Half-Life game will work. The way they described it, you have to hold the button for a few seconds to actually teleport, which I assume represents the movement from place to place, but then you lose out on things like being able to move sideways and shoot in front of you.
When I played Pavlov VR, it was jarring at first to be standing still, but moving at the same time, but I eventually got more used to it and it's quite fun. I'm glad they are giving options for movement and other controls though. Good on them for doing so.
VR's biggest barriers right now are usability by users with various disabilities, price, and space, in that order. I think things like the movement options will help with the first issue, but I do think that more time and money needs to be invested into finding more solutions there so more people can enjoy VR. Price is getting better, but still isn't quite there yet. Oculus Quest is very close to an ideal price for VR. Space is something I see Valve addressing with this game too, as there's options to play room scale, standing still, or sitting.