It's "make work" for an overstaffed inefficient waste of tax dollars.

Went through SEA a few weeks ago on a Tuesday night.
Shoe carnival was empty with no line at the DTCs.

To make work for the excess staff, they were doing quick/partial pat-downs of ALL pax AFTER they went through the Nude-e-Scope.
They were not changing gloves after touching all the sheeple.
The sheeple said nothing as it happened.

I had opted out and watched the entire scene while getting groped.

Again, something useless for the excess staff at the Committee for State Security to do.