@ExXB- You say it would never work in larger markets, but why not? The only differences I can see is in the numbers of persons to be screened. Or are you thinking of the collective screaming of people who believe they are being 'inconvenienced' too much?
You can have top-notch security or not as you wish. What you cannot do is make having it convenient or easy for those being protected.
There will always be bad guys looking to do harm, and yes they are going to go for an easier target if you make other targets too tough. So they may just be diverting these bad guys, but if all airports did this, then the bad guys would have to divert to things other than aircraft which in a sense would mean that you won the game.
I'm not a frequent flyer, but fear of bad guys has nothing to do with that. I detest the current security system because it disables me from being able to create my own defense against the bad guys, leaving me with only the "flight 93" option of winning at the highest cost to myself and those around me, which I do not consider a win but a draw. Either give an effort your all or make no effort at all- anything in between is wasted effort and a guaranteed losing of the game. If the more secure method I speak of were done everywhere, then I would feel differently- I would not detest a true security, but bather I'd embrace it. In the meantime I understand and accept the risks. And I know that unsafe cargo, mechanical failure, or human error without malice is more likely to get me than a bad guy. That would remain the same even with most of the current so-called security procedures dropped, so why bother making the half-a$$ed effort we're making now which is adding greatly to my misery while adding little to my security?
Following the direction we're now on to it's logical end, a time will come when they will all want PAX to fully disrobe, wear the supplied bright orange jumpsuit, and be locked into your seat to make sure that nobody can do anything potentially harmful while on the plane. All your baggage will be carried on a separate non-PAX flight right behind you so that you can't access anything potentially evil in it. And the more we accept their stupid "security" ideas, the sooner you're going to see this.
Now would you rather have that, or would you rather they end the current charade of safety and let you decide whether the risk of flying conveniently and comfy is worth it?