Well, for what its worth, I got kicked out of the state university for low grades in the early 70s. Too much political activism and not enough studying. I got a good job anyway because I lied about it. But I went back in the 90s and succeeded. I had learned to write, think, and express myself clearly. I took seminar classes competing with grad students and dedicated undergrads focussed on the subjects and got straight "A"s.
One professor asked me to be a teaching assistant "The Politics of The Vietnam War". I declined, having a career job in telecommunications, but the offer meant a lot.
The diploma (Bachelor Of Science in Government and Political Science) had utterly no effect on my career. No one where I worked ever knew I got it or didn't have it before.
But it meant a lot to ME personally.
If it helps your career, do it. But if it doesn't, do it anyway. It will matter to you all the rest of your life.