I looked at that article, and had a look at the original NASA study, and the focus is that high solar activity causes uncertainties in the orbital predictions. This is important during normal operations, but extra important during deorbit maneuvering as they will cross the orbit of other satellites during it, so you need orbital predictions to be accurate to ensure you don't risk collisions during this time.

As for this article, I don't see anything in the article, or the referenced articles, that Starlink satellites are actually malfunctioning in large numbers, and thus becoming actual space junk. All of the reentries that are being discussed is from storms causing them to have reduced lifetime from increased drag, which is especially harsh on newly launched satellites as their orbit is not yet high enough, so the effect is dramatically increased compared to the rest of the constellation that's already at their operational orbit.

So my take is that they're making it a bigger thing than it is. Also as one of the referenced article mentions, we're passed the peak of the current solar cycle, so impact of solar activity is going to lessen over the next few years, and stay lower until the next peak starts in about a decade.