The question asks for factors, and marvel scale can be one of them. If a question asks you to list all moves with a higher critical hit chance, you can't just ignore slash and say "the question asked about critical hit chance in general, not slash specifically." I don't think you can assume marvel scale reduces confusion damage either, because fur coat and grass pelt don't affect it.
Also the other question asked about whether confusion can activate marvel scale, not whether marvel scale can reduce confusion damage if it's already active.