I'm 64, was in the bottom third of my graduating high school class, went to college and graduated with a 2.00023 GPA and went on in life. When I went for my next degree in my 40s and 50s I "cared" more so got a 4.0 in my courses because it was "fun" and what I wanted to do. I retired when I was 55 and live quite comfortably in my own home on the water, etc.

The grades don't matter as much at the attitude. But one has to watch the attitude, not get too complacent or too obsessed, either one?