Nobody says the chance of a collisions is zero. That's why it being in LEO is relevant. Internet fools who just get scared by the big number without considering the details of the situation always get this wrong.
That is, if you disregard the following quote from the article:
> Each re-entry deposits about 30 kg of aluminum oxide into the upper atmosphere--an uncontrolled chemistry experiment on a planetary scale.
"Aluminum oxide compounds generated by the entire population of satellites reentering the atmosphere in 2022 are estimated at around 17 metric tons. Reentry scenarios involving mega-constellations point to over 360 metric tons of aluminum oxide compounds per year, which can lead to significant ozone depletion."
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GL10...