This source says otherwise: "ophthalmologists agree there is no reason to be concerned that VR headsets will damage eye development, health or function." https://www.aao.org/eye-health/tips-prevention/are-virtual-r...
It seems like there is just a lack of data regarding the impact of VR usage on eye development and as a result people are being rightful cautious.
Unless, of course, they're actually your whims and you're using "my 5 year old wants it" as a perfectly valid excuse...
My 5-year-old has fun playing Mario on my 20-year-old Game Boy Color, but has no idea that VR or VR gaming is even a thing. Maybe I'll get him a Game Boy Advance SP or a Gamecube in a couple years...there was a Penny Arcade or XKCD or similar webcomic a few years back about someone who had artificially restricted themselves to games and systems released 5 years before the present so they could savor the improvements in game design without dealing with the availability issues. It was presented in jest but is actually a reasonable system, and saves a lot of money in the process!
[1]: https://arstechnica.com/gadgets/2021/03/googles-vr-dreams-ar...