sudden 'aha' moment: in (some?) Dutch culture, unsolicited feedback is often considered normal, and (unless someone is an asshole) given from a perspective of respecting someone and wanting to support them in their endeavour

but in some unclear subset of other cultural backgrounds (including but not limited to the US?), it seems to be interpreted as "claiming you know better" by default

... is this just the competitive vs. collaborative society thing again? where in a competitive society you signal superiority through unsolicited feedback, whereas in a collaborative society it's about contributing to an emergent shared project by adding a perspective? (without implying superiority of that perspective, just that multiple perspectives combined tend to produce better outcomes on the whole)