I'm just saying it logically follows that killing yourself is likely even better than not having children.

I consider it a failure of the study if it says "don't have kids" if (and only if) its original aim was to show how that can be done without drastic measures (such as "kill all humans", "don't have kids", ...).

It's like suggesting to not have kids in order to fight cancer. Yes, absolute cancer occurrences will decrease if you don't have kids, yet we have not in any way addressed the underlying problem.

EDIT: Previously I said "absolute cancer rates" where I should have said absolute cancer occurrences