I am one of your fuckees. The house I bought was expensive enough as it was. I am not changing a brand new dark roof for a different one for an exorbitant price right now, because budget. A perfectly new roof going down (isn't that actually waste?) for saving, say, 10 of 30 days when the AC is really needed?
(I am also not even sure if roof colors are regulated by the local authorities or not. There are over thirty houses in the same project, with the same roofs. Maybe I wouldn't even be allowed to.)