Yes you do, and in good reason, do you wish to get where you are going in one piece, or would you rather have friends and relatives standing staring at a some memorial somewheres.
As a person who regularly, and I mean daily, has to undergo these checks as well as submitting regularly to criminal and state security checks, yes it is right and proper despite your complaints about your rights being infringed, that you are checked and its done to everyone and in the most conciencious manner possible.
You are not going to rent the aircraft to live in for months on end, you are just going on a journey, from one point to another, but you are doing it in a potentially flying bomb.
Thats the big feature here folks, so stop bleating about your so called rights and get real.
An aircraft can not pull over and stop, when you are at height you are in an alien atmosphere only kept alive by the aircraft systems, if I was to pop you outside for a few minutes you would not survive.
Neither would you or the aircraft survive should explosive decompression occur at altitude, and this can happen with either an explosive device going off or a projectile piercing the structure.
The security checks are there to stop this happening, if you dont like the checks then strap on some wings and leap off tall cliffs if you still want to fly, because thats about the only place you are not going to be inspected.
And finally it is right and proper that the Various Governments issue orders about security checks, the companys on their own initiative will not do it, they have to be told, or old man money will stop them due to costs.
Your Governments instituted police and prisons to protect society,and the airport checks are a modern nescessary extension of those police powers, again to protect society.