so, installing random software from random repositories equals fragility? that doesn't seem specific to apt at all. however the article is written Fedora-specific, so maybe people don't like to point out that dnf/yum is susceptible to the same problem. In fact, the article doesn't even try to call out apt, or fragility.
There is a use case for immutable distributions, just as there is one for those distributions which are not immutable.
It is dishonest to attribute fragility as a basic flaw in apt, when system fragility is a consequence of ignorance.