It's called the Action icon, a generalisation of its original Share meaning. It's used throughout the Apple ecosystem so knowing that's where actions live is not a big expectation.

You've mangled the steps. You only press one Action icon in this sequence, then you select Print, then you need to select the printer and any other options, then you tap Print. Which of these steps do you think 'abstruse'?

Are you suggesting they should use a little icon of a printer, peripheral that takes many wildly different forms, instead of the word Print?