It's important to note that "push through" here actually means:

Stop when you feel discomfort. Do other things for at least a few hours. Come back and play some more. Repeat this process, and you can play longer and longer sessions without discomfort.

If you try to force yourself to keep playing, it'll actually make the symptoms worse and you won't adapt to it.

Lol, we aren't talking about training for a marathon or rescuing someone from a burning building. VR headsets are a niche toy that many people find unpleasant to use, and will likely always be a niche product.