These handheld lasers have never taken down a singe airplane, IIRC, due to multiple backup systems starting with a second pilot not likely to be simultaneously injured and the fact that most large airliners use instrument landing technology and can be flown with no visibility outside the aircraft.
Land-based laser pointing at airplanes in landing approach zones is arguably even more effective that air-mounted laser pointing on a UAV, I would expect.
Think of that restaurant in Denver where people can see the incoming planes lined up for 50 miles approaching the airport. Any malicious laser-pointing terrorist or creep can use any promontory to attack the cockpits in incoming planes without needing to mount the laser on a UAV.
UAV/drones are much more effective against aircraft turbofans as a kinetic weapon with no onboard lasers or explosives needed, IMO.
Perhaps all aircraft need to be retro fitted with similar lasers....programmed to seek out “incoming” laser light sources...and DESTROY them and thier operators?