If that were a valid concern half my ancestors would never have been born.
Fair enough.
I, on the other hand, am reluctant to condemn a married man for having sex with his wife. There are a lot of things I will condemn a man for and call him irresponsible, but that just isn't one of them.
Some people are reluctant to condemn a man and call him irresponsible for driving drunk.
Drunk driving, unlike procreation, isn't a biological imperative inherent to the survival of the human species or the bloodline of a particular family, nor is it a sovereign right of families to engage in at a time and place of their choosing, nor is it something people can necessarily chose not to do when conditions suddenly change.
Drunk driving, unlike sex, isn't a private action between two consenting adults in the context of an established relationship, the practice of which is as old as the human race and as fundamental to human existence as eating and breathing.
Of course there are a million ways to go on ANY particular issue, but setting yourself up as the arbiter of "good judgement" over other people's married life -- particularly, people you don't know, whose situation you're not fully aware of, whose NAMES you don't even really know -- is kind of a dick move by any measurement.