That's a terribly stupid way to think about it. For one, it's not like you take one class and you're done with school. For two, it's not like your "45 credit hour" class is literally just 45 hours of "learning". If it's a computer science or engineering class, you're likely going to have homework assignments and projects that will consume as much or more time than the face to face instruction.
Also, usually what you're learning in class are the fundamentals that undergird what you need to know for software development in the job. The basic underpinnings and context to understand what you're learning those first two weeks on the job.
And if you're going to be that dismissive about what you learn in a college course, I'll tell you most of what I learned the first two weeks on the job: how to use the specific IDE the team I was hired onto preferred, how to build their specific project (barely applicable outside the project), how to contact IT to get a ticket to get them to install the IDE because I didn't have permission to, how to use the timecard website to log my hours, where the people on my team prefer to go out for lunch, a few hours of HR sexual harassment and cybersecurity training, how to set up my 401k and medical benefits, etc. etc. Basically, nothing to do with "computer science" which is what the original post was about.