I'll be honest, the first place I heard this argument was in this video at the 2:30 mark:
I also came across it here while googling to find answers: https://physics.stackexchange.com/questions/275619/are-gravitational-atoms-stable-without-quantization
And since I know those aren't really...
Of course atoms are stable, I didn't mean to suggest that they aren't.
When I was trying to learn why it seems that there are a fair number of people that start with the assumption that gravity is quantized, one of the arguments that seemed the most solid was that if it wasn't, atoms wouldn't...
Ok, so I've been on a kick trying to really understand why QM and GR are incompatible. I think I get that GR can't be realistically converted into a quantum field because it creates some infinite series that you can't use the normal tricks you would for other QM fields. Hard block, ok got it...