Here is a little background.
Long ago major airline carrier companies formed an alliance of rules. All pilots, flight attendants and mechanics are hired by all companies to the entry level position. It is not possible to move laterally or up when changing companies. A Captain that leaves American for Jetblue leaves a $200,000 job and starts as a new hire copilot for $20,000
As a result, employees are tied to the company. Period.
Safety and safety decisions cost money. Companies have a long history of reprimanding employees that make safety decisions that cost money, to include termination. Human nature what it is means pilots make decisions to keep their jobs and risk safety.
The only thing that has made Western, including the US, airlines as safe as they are are unions backing pilots that make articulated decisions on the side of safety and a regulatory environment mandating and prohibiting certain decisions and operating environments, both resulting in the safety statistics the traveling public enjoys today.
You take both of those away and we will go back to significant accident rates.
That is just the way it is.