Keep in mind that 23 responses is not a big enough sample for decision-making. The results you see are of "VR only", not VR use, if you see "Both VR and Desktop" it's most people, so you do need both working well.
Actually, that question was a bit strange for me, it's too open to interpretation for "VR only". I can see that "Both" is clear enough, the person sometimes uses VAM in desktop and other times with a VR headset, and "Desktop only" is also clear because if you don't have a compatible VR headset then Desktop is the only way you can use VAM. I think that if you have a compatible VR headset, even if you hardly use it with VAM you would likely try it at few times, so it would be a "Both"?
A scenario with "VR only" feels very restricted to just a basic use of VAM, or the interpretation is more open-