I don't disagree - however, in an overcrowded coop (as this would be) having the *option* of escape into the run can be a good thing if/when something happens during the hours that the chickens would normally be confined with the coop locked up.
This would only be considered overcrowded in very cold, snowy climates. I have kept up to 16 hens in a 4x4 coop without any problems at all and very happy hens.