<<Of course, this might be less of an issue if we established controlled airspace to protect commercial passenger carrying aircraft>>
My opinion for the last 40 years. I corresponded with GATCO from overseas about the UK situation. In those days Control Zones only existed at airfields with Min of Av ATC, but then various "fixes" (SRzs, etc) were introduced. I'm a great believer in total control - Class A if you like - around airfields operating commercial traffic.