If every time you blinked an angel got its wings, we'd be surrounded by a veritable flock of celestial beings by now.

Have you seen the biblically accurate angels that are just wings with wings with wings with wings? That's what's happening.

Depends - what is their half-life? If it's less than the rate of eye blinking, then we aren't even keeping up a stable population!

How do you know we aren't?

Maybe we are but they can only be seen by the good people.

If I had wheels, I'd be a wagon

Concerning angels there is only one important rule.

DO. NOT. BLINK.