It all depends on what you want in life , I consider myself lucky in a way as I have done LH for a number of years and have decided it’s not for me anymore and have bitten the bullet to leave a legacy to go to a low cost holiday company , which assuming I get a command one day will give me more money over the rest of my career.
It’s not as simple as saying why would you stay at Ryanair and not go to BA ?????
maybe people want more money and operate from a nice easy regional base ? Or don’t care about boasting who they work for … just my thoughts