If you ever wondered what working as an engineer is, you should watch the episode ”Spider”, from the tv show From the Earth to the Moon. It show the trials and tribulations of developing the lunar module for the Apollo program at Grumman.
The episode show that the work is hard, it seems like there are just problems all the time that needs to be solved. But all of a sudden you have a thing that works. In this case it lands on the moon ?. But I think the pride of an engineer seeing your ”thing” working is universal. And it makes all the work worth it.