Presumably the end goal is a legacy, but yeah better learn to enjoy the journey. Don't want to spend your whole career up until your final three years pizzed off that you're not a WB CA with weekends and holidays off.

If you're younger, better assume there will be at least a couple ups and downs along the way. Aggressively pursue a seniority number at your career-destination airline (shoot for "too big to fail"), hang on tight, and enjoy the ride.

If you're older, better plan based on known industry conditions, and have a plan C for worst case Black Swan that you might not have time to recover from.