"The line of argument supports the prevention of the existence of an undefined number of living beings to max. the quality of life of other existing living beings."
The argument doesn't seem to me as simple as you are portraying it and I don't see where you got the extermination part from.
The comment I was responding to said nothing about increasing the quality of life of any living beings. It only asserted that non-existence is a good thing. I made the assumption that they came to that conclusion based on the reasoning that a pig that does not exist cannot suffer. I made the extension that you can also prevent suffering by immediately ending a life. Yes, there is a distinction between failing to breed another generation and immediately killing all members of the current generation but the end result is the same.
this phrasing is really disingenuous. What I said was non-existence in case of farm pigs is a good thing. Try to make less sweeping over-generalized statements, especially when responding to people who aren't doing that
> I made the extension that you can also prevent suffering by immediately ending a life
oh cool thought, did you just bring that up to argue with yourself? Because no one said anything like that prior.