Airlines in general and low-cost airlines in particular know that they can offset the entire cost onto newcomers, but what most don't realize is that they now offset the entire risk as well.
One does not have to look far to see examples of this. Easyjet very clearly told the cadets YOU ARE NOT AN EMPLOYEE.
Ryanair is doing the exact same thing with this training organization. If travel demand, company restructuring or God forbid you don't satisfy the standards during the course. They have zero responsibility to take you in afterwards. Because simply put YOU ARE NOT AN EMPLOYEE.
Don't be naive in thinking otherwise. This is a training program contract which puts you in the hole for €35k minimum considering all costs involved. After that should things be going well, you'll be offered an employment contract to work in 2022 as printed on their advertisement.