I imagine it’s unreplyable to prevent hijacking - we all think we have something important to say, so there’s a temptation to put it as an unrelated reply to a

I imagine it’s unreplyable to prevent hijacking - we all think we have something important to say, so there’s a temptation to put it as an unrelated reply to a top comment so more eyeballs see our comment. You’d want this in place regardless of whether the link is organically voted up or artificially pushed to the top for convenience.