How to do you "retrain" to get abstract "skills in areas like critical thinking and problem-solving"? When I think "retraining" I think training to perform a different kind of routine job in a different domain or industry. For example, decades ago, the NYT retrained its Linotype operators to a similar computer data entry job[1].
[1] https://vimeo.com/127605643 or https://archive.org/details/FarewellEtaoinShrdlu or https://www.nytimes.com/video/insider/100000004687429/farewe...