Earlier quoted context omitted.
Exactly! Everyone should demand a full cash refund for all that they paid for the maintenance of that piece of software.
This is a common snarky retort when any discussion happens with open source software, but it doesn't add anything to the discussion. There is a cost to using software that goes beyond money exchanging hands. The maintainer has no legal obligation to do anything, but acting as if someone having an issue with software having security vulnerabilities is someone being entitled is a childish reduction of the interactions…
It at least makes it very clear to those who have not paid for the maintenance that their position is silly if they make demands of the maintainer. It is his project and he does as he pleases. Why is that difficult to see?
One could perhaps persuade him to accept a patch but like any endeavour where you need something from another person, either you offer them something in exchange (which they value enough) or ask nicely and see how it goes.
In either case, it might still fail. In that case, one can of course try and do the same with _someone else_ who might be more receptive. This is possible with free/open-source software.
What you consider a "snarky retort" is just the same thing said in a different tone.