This argument commits the same fallacy as the argument against piracy; copying is not stealing, because the original still remains. A lockpicked and squatted house means someone else does not have that house, it's a zero sum game which information which is freely copyable does not align with.
That only works if you assume that the exclusive value is in the object and not the labour.
The reproduction of the object is essentially free in the internet, but the labour to produce it isn't.
If I spent 3 years making my codebase, and you copy paste the git repo, yeah your access to the information is not going to replace the original. But your labour cost is 0 and you can undercut the 3 years of expense, loans or debt I adquired to produce it.
Btw the FBI murdered Aaron Swartz for attempting to open access to research papers, Mark Zuckemberg admitted to stealing those ssame papers through libgen and showed off the results of Llama and his stock price went up.
I think the piracy argument falls apart when the class warfare and 2 tier justce system is openly weaponised towards open access