The logic here is that Meta (a company known to be malicious) is putting out a product which is potentially dangerous. There are some anecdotal evidence of said dangers, and it is perfectly rational to believe given the history and dangers involved. Best case regulators step in and ban this product before we know the validity of these anecdotes. Worst case, regulators do nothing, the public starts using the product, and these anecdotes turn out to be valid.

Off course there is space between the worst and the best case. But given Meta’s history it is safest (and the most rational) to assume the worst.