I have always been happiest when I put things in this exact order/subordination:
I am a person first. I am a career maker second.
Whenever I swap those, I get into wretched trouble.
Of course, what I have been mostly paying attention to as an adult is what it is to be a person. So it would make sense, in order for that to have any career value, to be a person first, anyway.
But even more importantly, if career comes first, then you are a career person and since you are what you do, then you are simply that and you slowly but surely become less interesting. Plus, you burn out and your ego gets inflated, takes a beating, rinse, repeat, blech.
Additionally, you could end up with a very skewed and sad perspective and a very strange face if you are single minded. Look at Goldie Hawn at the 2014 Oscars. She had an idea of her career, or something like that, coming first. She mutilated herself. If she had been a person first, she would not have ended up looking like ___________. There are so many sharp jokes that could be made at her expense. But really, sadly, she got caught up in a thought process that chucked herself first and put some misguided ambition in its place. It's not worth it. And it eats up your time and energy. And who you actually are.
Do not mutilate yourself. Anyone. Have a career. Second. Be a person. First.