I am sorry you think that. Throwing out a blanket statement that its dumb to fly within 1.5m of an airport is myopic at best. Within 1.5m (or any distance up to the perimeter fence) there are many areas where a drone COULD fly safely and pose absolutely no risk to aircraft. Within the 5mi ring of an airport there can be towers, water towers, power lines, trees, buildings and other hazards to aircraft navigation that would prevent any safe flight of large scale manned aircraft.
For an example, in my area there is a 300' water tower half a block away. There are 200' tall cell towers about 2 blocks away. There are power lines 150' up along behind the houses. There are trees 75-80' along our streets. So, tell me what manned aircraft is going to be flying below the water tower? How about ones below the power lines? How about which ones would be flying below treeline? Well, I mean manned aircraft that don't have pilots in the process of yelling "Brace brace brace!" into the intercom and having the aircraft shredded by surrounding obstacles as they crash. None of them would have any worries about hitting a drone before the plane hit the tree next to the drone, the power lines above the drone, or the water tower well above all that. And tell me why a drone can't fly safely above a house here videoing Halloween or Christmas lights at 50' to 100'? Could that same drone fly at 400' safely? No probably not. I certainly would not.
The problem with everyone's logic is that they assume there is absolutely a complete bare scorched earth disk 5mi in radius around every airport. That is not always, and I submit, its rarely the case. There are, in fact some pretty substantial buildings within 2mi of the control tower of O'hare airport and I think we all can agree thats a pretty major airport and not some poduk dirt strip.
Your blanket statement is like saying every road in the country should have only a 25mph speed limit because because that single road over there can't be safe at faster speeds. That doesn't account for actual conditions any more than your statement does. Or DJI's. There are places where its dangerous over 25mph and other places where its completely safe to do 70mph just like there are places where its safe to fly a drone at a low altitude within 1.5m of an airport and places where it is not.