I share your frustration at this horrible business practice. I disagree with your assessment that this practice is a secret. I don't think it's a secret. The largest newspaper in Finland, Helsingin Sanomat, actually published a long-form story on this exact subject after your comment was written: https://www.hs.fi/visio/art-2000008571439.html

Edit: to clarify, if the practice is not a secret, then it's not deceptive. If the client knows that the CVs on paper are not going to represent the workers who will be actually doing the work, then it's not deception. In order for it to be deception, the practice would have to be secret, surprising once revealed.

If the position is learnable from where their skillset is within a reasonable amount of time, they should learn up! I've been given plenty of positions that were above my abilities but that I could learn within a couple months.

There are a lot of types of people in the world, and one type is people who don't mind being bad at their jobs.