I would defy you to pass one of my chemistry classes without attending class.
I have never had a student pass without regular attendance. I've taught at three public universities, two private colleges and physics at one public community college (so I think my student demographic has been quite diverse).
I did not REQUIRE attendance to pass, nor link grades/points to attendance in any, way shape or form. Scores/final grades were 100% performance based.
I only rarely lectured on material not in the text book, though I often presented the material differently than the text presentation.
As I told my students on the first day, "I don't care if you learn it from me, the book, your room mate or who ever, if you can do the work, you'll pass."
Generally, the people who did not attend regularly scored in the teens on the tests, or even single digits, on the tests.