It’s done that way so the breaker box will fit between studs that are 18" on center, which is standard for USA residential construction.

You generally only see breakers on din rail in the USA in industrial equipment.

STEM people are trained with principles that are consider absolute until a paradigm shift happens.

That’s inaccurate at the very least for scientists. Scientists are trained to test and retest everything. We tend to give them names like “positive controls” when we run experiments on things we’re pretty sure are going to work, but we still test them.

Likely Timnit Gebru who has been working in the area of the ethics of AI for quite some time.