But this doesn't fall under "Hilarious". Sure, ideally the default unit should match locale. But not doing that doesn't seem like they are trolling to me. They are just lazy. The decision isn't dumb, they just targeted their primary audience (even if it is a minority) and moved on.

And the authors suggestion of pixel seems worse, even to me living in a metric-first country. I would take inches over px as a default (but give me mm please).