That's such a bad argument. I do no such thing. However, the reality of my profession requires me to fly. So I "consent" only under considerable duress. The choice is literally "put food on the table" or submit to incredibly intrusive security.
There are good arguments against "automatic consent" but this isn't one of them.
You consent to lots of things by driving on public roads, yet many people's livelihoods depend on driving on public roads. It doesn't mean that the consent for driving wasn't given.
The choice is literally "put food on the table" or submit to incredibly intrusive security.
No it's not. You can quit and get a new job. If you can't immediately find a new job, you will be on unemployment and food stamps. You will literally still have food on the table.
Edit: by quit I meant don't get on the plane, resulting in being fired
That's not consent, that's coercion.