[self_awareness]

Most programmers don't have any opinions, so if they use an unopinionated language, they end up using patterns that opinionated people use. So it's better to have one source of truth for opinions, so that we don't end up using the "wrong" opinions of people who talk more than they think.

[flohofwoe]

Compiler/language people are also just "opinionated people" though. Some have good opinions, some have bad opinions. In the worst case you have opinions which are the result of a 'design by committee/community' process.

[self_awareness]

Single source of truth of opinions can be challenged and changed if one's arguments are good enough. The benefit is that it's easier to see the advantages and disadvantages for those opinions, because they're all in the same place.

This is in contrast to C++, where one organization creates a set of guidelines, another organization creates another set of guidelines. Valid arguments of critique in one organization are not seen in the other.

Single source of truth is also beneficial to compiler authors as well, because they get more feedback how the language is used and why.