He sure discovered this new open source thing and it's very confusing. It's not like it's almost 40 years old at that point. I'll never understand people who lie like toddlers.
Being a great software developer does not make you a lawyer (not even a bad lawyer).
By your argument, I can just torrent moviez and appz because I'm not a lawyer and can't be bothered with minutae of copyright law.
That is why when such a marketing claim comes up, the first question to ask is from which base they built the respective product in 4 days, and which kind of additional value the respective company added during this process.
Indeed, there exist people who argue that in many areas law has become so complicated and unclear what is allowed or not that you cannot thus expect from ordinary citizens to obey the laws anymore - even if these citizens are willing to.
Thus politicians do have an obligation to make the laws as clear, logical and comprehensible as possible, otherwise they loose their legitimization of expecting citizens to obey them.
That's no excuse for a VC-backed startup just ignoring it and YOLOing their way.
This actually disincentivises small creators (open source maintainers and contributors, in this case) from participanting in the very thing copyright is supposed to foster.