Someone convinced me to study computer science 20 years ago. The career possibilities with good money and easy work have put the rest of life on easy mode (for now). Even meeting my wife and having my family would never have happend without that decision.
My take, as a German, without looking up the historic consensus: In Germany the oppression against Jews gradually increased from 1933 until WWII started in 1939. This gave many the opportunity to emigrate. In Eastern Europe, Germany quickly invaded („Blitzkrieg“) and immediately stated rallying the Jews into ghettos and started murdering them. There was no real chance to emigrate or flee.
Edit: a typo