Starlink satellites aren't large enough to survive the heat of reentry. A more likely concern is the various materials vaporizing and dispersing into the atmosphere, as was mentioned in the article.

That being said, calling them "heavy metals" like the interviewee did is rather dubious. We're not talking about lead, as what most readers imagine when they hear that term. It's mainly aluminum and copper. The person interviewed is picking their words to overexaggerate their claims

Well if the atmosphere decides it's going to have a day off then I'll start to worry.

The temperatures generated by reentry are not just hot enough to vaporize a satellite they are way beyond hot enough to vaporize a satellite. I can't imagine any scenario where a satellite survives. In any case the vast majority of the orbits are controlled, Which means they come down over the ocean.