Yes, and the whole paragraph is repeated in in the MM Glossary. Therefore to call out just one sentence as "redundant" isn't right: it's all redundant.
The third sentence is confirmed as a rule, seeing as it is repeated on every minion. So that text while redundant, is not just an observation. Clearly it doesn't cease to be a rule just because it's repeated.
It is therefore right to say that this paragraph containing three sentences contains at least one rule. To assert that the first two are observations becomes picking and choosing as there's nothing about those sentences that differentiates them from the third that the designers packaged them with.
I see why
@Maxperson entertains it in support of their argument, but it continues to appear arbitrary. With no explanation for how text supposed to amount to needless observations is distinguished from rules. And giving "destroyed" a special meaning here when it is everywhere else used with consistency.