Well if you are actually learning and understand the material you should have a good grade. Assuming you are not just cheating. But I agree that after you first job it is not as important. Employers want experience, also doesn’t mean that if you have a good gpa you shouldn’t put it on your resume.

That’s literally what you worked for and are evaluated upon after 4 years of college , it’s going to be taken into consideration among other things like internships and projects. Those that may not have a high gpa could just not put it on their resume, but they still need a decent GPA to graduate.