From the comments. On mobile so can't test. Anyone know if this is true?

"You could always just waggle your mouse around for a second before clicking the "I am not a robot" checkbox to skip these almost every time." gdog2406

The captchas trains AI to recognize the shape of helicopter. "Select all humans in this picture" captchas will be hard, but "select friendly helicopter to add to set {excluded shapes} " for targeting seems not. Its because set {humans} are diverse set of shapes and helicopters are static.

Yeah, I don't like being tricked into helping kill people.

Any action you take can help it.

Even not choosing increases the odds that the responses it does get are correct.