Mostly, Kessler syndrome isn’t something to worry about at all; there are just a lot of orbital planes available. But in LEO, the mechanics don’t even apply.
First graph is a list of deorbit times: https://www.nasa.gov/smallsat-institute/sst-soa/deorbit-syst...
As expected, higher altitudes, higher mass, and lower surface areas correlate to longer deorbit times. It looks like altitude has an extreme effect on deorbit times, as you can see the 100 KG satellite (solar min) deorbits in a little under 2 years at 400 KM, but over 15 years at 500 KM. So 1.25x the altitude results in 7.5x the deorbit time.
Stuff at 800-1000 KM can take centuries to deorbit, and that's within both NASA's (under 2000 KM) and the ESA's (under 1000 KM) definitions of LEO. There is a definition for VLEO of under 450 KM, which would have fairly short deorbit times, and therefore a relatively mild Kessler Syndrome.
For less starving people? For less child abuse? For less climate change?
I look up at the night sky and i want to see stars and the endlessness of the universe and don't want to be reminded that Elon Musk will poisen our atmosphere.
Yes. The only way to truly solve these issues is technological progress.
It's not technological progress we need; it's cultural progress.
IIRC no place in the world which has hard-paved highways has ever seen a peacetime famine. That's almost exclusively the domain of mud road territories. Of course, this is partly a correlation (mud road territories have worse governance and more banditry), but there is causality as well.
So clearly you are in favor of starvation and human suffering due to climate change because of your irrational distaste for seeing satellites in orbit.
I suspect the root cause is you've overdosed on propaganda on the internet.