desperation to hire = you'll take applicants that nobody else will.
This translates to a huge time suck. They use up 2-3 times as much sim time, instructor time, LCA time, etc. Meanwhile, the training curriculum stretches to 4,5,6 months for everyone. Then, most of these pilots get fired (forced to resign, same thing) and take their ATP, type, and Sheraton points when they leave. Thanks for the free breakfasts!
Higher quality applicants = finish training on time, less work load on sim instructors and LCAs, better overall culture.