Some of them sure. The subset of them who are GPL advocates are simply confused though. GPL is not possible in a world without copyright. In a world without copyright I can release software, which can be written from the ground up or be based on something open source, doesn’t matter, and not share the code with anyone. Just the binary. I can also create AWS based on open source software and nothing like AGPL will stop me from providing proprietary services based on it.
If you want to see an argument from someone who opposes copyright, but has more consistent views on the matter, I recommend this piece: <https://github.com/BurntSushi/notes/blob/master/2020-10-29_l...>
And the reason I pointed to the fallacy is that multiple people in this thread suggest that making a proprietary product based on open source software constitutes taking something away from users of this software. This is illogical. They still have the original. The only person who loses in this situation is the original author, not the users.