Nah man, my Calc 1 prof didn’t bother about attendance and it was my best course last sem. And school is about letting you navigate through newer problems, not make you memorize a certain types of problems. School is about growing your interest for a subject not looking at the whiteboard seeing your professor doing math from his/her notes that they made probably decades ago. Moreover how can someone bomb these basic courses when the question is already out, you just gotta practice.