I used to like Johnny Harris quite a bit, but when your research is Wikipedia deep, and your method of convincing people is to make incredulous faces I start to lose interest.

All of SpaceX's satellites are in low Earth orbit, and will deorbit themselves over time even if they die. Kessler syndrome is bad but overblown, and far more likely to occur due to antisat missiles from nation states.

There is an increased risk of collision, but the increase is marginal at best.