There are hacks for the Meta Quest. I am assuming you meant to say you might buy one if custom Roms without the meta intagration were available?

Looking at all the other countries, it may not have had an impact on future birthrates at all.

Yes, and if they didn’t have the policy in the past, then today’s birth rates would be even more devastating for the demographic

where a 30ms difference in reaction time is noticeable (this is less than 1 frame in a fighting game, for example)

You have some pretty bad understanding of how netcode works if you think a 30ms ping in an online multi-player game means your game or input is delayed by 30ms. It’s a lot more complicated than that, and especially in games with bad netcode you will absolutely notice a difference between 10ms or 30ms ping

Is it because latency does not scale in that way?

Yes, your understanding is fundamentally flawed. Starlink adds a fixed latency on top, if you ping to a server was 2ms with fiber and 52ms with starlink, then your ping to a server that would be 100ms with fiber would be 150ms with starlink

I live near DE-CIX and have fiber. So a decent chunk of web services I use is available with a latency of under 5ms. And everything else hosted in a European datacenter with under 20ms.

So almost all of my internet traffic has a lower latency than starlink has under ideal conditions