5 Hour calculus is the FLUNK OUT COURSE at the University of Cincinnati and has been for decades.
Mathematics prpares peoples minds to follow good logical thought order and processes. Not just how to figure out some complex problems like structural or Manufacturing fabrication answers for making of products or even civil engineering projets..
I have two people in my family who actually Teach calculus in school.. At Advanced placement levels which means they don't have to take it in college... They are a niece and one nephew. My daughter also could teach it... I have forgotten more than I retained from lack of use over some time away from daily applications in my fabricating corporation..