I imagine that someone asking for advice isn't trying to take any comment wholesale. It's to help answer one of the above questions that they currently cannot right now.

For an internet forum, I've found it easier to ask direct, actionable questions like "should I buy this couch" than "is [couch brand] good?". Even if what I really wanted to get at was the former. Maybe the brand isnt good but the price is a steal. Maybe the brand is so utterly trash that you couldn't give it away. But putting the brand into the question instead of a direct 'thing' changes the discourse.