I think the point is that the banner is more likely to extend your search by sending a negative signal than it is to speed up your search. Fair or not, potential employers often have a negative bias toward people who are unemployed, so indicating that you’re likely unemployed is unhelpful.
It would be far more effective to spin up a placeholder 1-person contracting firm as your current employment even if it's marginal work for pocket change (build websites for a friend or something).