Couldn't agree more. I'm not sure why this can be seen as an unpopular opinion at times. To pull systems apart, knowing how they work is an obvious advantage.
I feel that I am better at red teaming because I was a SOC Analyst, I was tech support, I was help desk, I was a sys admin. More than any college degree or certification, or technical knowledge I have, empathy and knowing how things work has made me a better tester.