At Starlink's low attitude all orbits decay eventually without active station keeping

This is assuming that the satellites all remain in one piece, the idea behind Kessler Syndrome is that one impact will generate loads of fragments in unpredictable orbits and cause a chain reaction.

That being said I don't know what the probability of such an event is, I assume it's fairly small. I could look it up but I've got to fix an omelette.

I'm not an expert in orbital dynamics, but (logically) if the point of impact is low enough that it's within a high-drag area of space, then any orbits generated by the impact must have that point as part of their orbits, therefore all pieces after the collision should decay eventually as well.

This doesn't happen. The energy is not close enough to shoot things far enough up that they will not decay. On this altitude Kessler Syndrome is so close to impossible as to be a non issue.

Oneweb is 1000x more dangerous compared to Starlink but that not by Musk so nobody cares.

How was the omelette? There's one on my horizon after this all hands is over :)

Ended up falling back on my old standby of instant mi goreng with bok choy and fried egg on top. Tastier than anything you can make in 15 minutes has any right to be.