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by sokka_h2otribe 33 days ago
Your roofs are (often) concrete flat roofs with structural floor

The American roofs mentioned are typically significantly inclined, made of a less rigid material (wood, asphalt shingles), and not built to the expectations of supporting as much.

When OP says 'the worst place' they mean it is not a structural place, it is hard to access, and it serves an important function that is best not to mess with.

Note, I do not fully agree with OP but I get the points made.