Easier than flying a plane? Definitely. I used to be allowed to play in the FA-18 simulators over in Cecil Field when I was stationed there.
Easier than driving a truck through a crowd? Also yes as well. You have to think about the gas, the brake (clutch if you're in a standard transmission vehicle), as well as the steering and making sure you point in the right direction and are fast enough to run them down.
All you have to do with a gun is point and squeeze the trigger.
You want me to believe you flew a real simulator and think flying a plane into a building is hard? Next thing you will be telling me is that the only purpose of a fully automatic weapon is to kill people.
Wait, you already said that, didn't you?
Taking off isn't much of a problem...............all you have to do is remember what speed is going to get you airborne, and when you reach it, pull up on the stick.
Flying it is a bit different, because when you're in the air, not only do you have to see where you are, but you also have to pay attention to where you're gonna be in 30 seconds. Wanna know what pilot sensory overload is known as? Having your hair on fire.
And yeah................the only purpose of a fully automatic weapon is to kill as many people as possible. Ever heard of any hunter going after a deer with a machine gun? If you have more than 3 bullets in the deer, you've probably ruined the meat. How much worse would it be if it had 30-500 extra bullets in it?