> Why do people like him think copyright laws are bad and made by rich people, but also support open source software, which relies on the same copyright laws to exist.
Because they have more nuanced thoughts that you think ?
"A copyright law" is not a one thing.
DMCA doesn't touch OSS software for example. It could entirely go away.
Length of copyright protection could be 5 years from creation instead of 70y from authors death and it would do near jack squat to OSS software. Ye you could use 5y worth of unfixed bugs and ignore OSS license but that wouldn't exactly hurt most projects.