Bags risk damage to the slide, which could prevent passengers from using them, as well as causing physical impact injuries to passengers below. There is no excuse.

exactly. "but this one time nothing happened" is just sloppy complacency

there was this article on the hn front page not longer than a month ago about this very issue https://fastjetperformance.com/podcasts/how-i-almost-destroy...

The plane bounced 3 times and the flames erupted on the second or third bounce: https://www.youtube.com/watch?v=t9_xh7aK2No

I don't know what video you are referring to, but the ones I've seen from the inside look like the plane is taxiing after the third bounce, which likely caused the fuel leak and the whole fire.

Grabbing bags is stupid, here in this case people died for a different reason.

> One passenger carries a bag so heavy it bends the slide halfway through and violently hits the ground

Not to discount the stupidity involved in holding onto one's bags (which I absolutely agree is absurd, whether it's attributable to simple human nature or not), but that makes it sound like the slide was defective as well. Even a very heavy carry-on is relatively modest compared to the weight of the person carrying it.