The day to day business of engineering is more fun than the day to day business of physics. The ideas of physics are more exciting than engineering.
In both you ask questions of the form, ‘Why is this the way it is?’
The physics answer speaks to the nature of creation itself.
The engineering answer is, ‘Because I did it with a different servo, broke six of them, and now I don’t have any left. But I found a stack of these suckers in a closet.’