Meh. But wouldn't that mean that all good Men should be completely suicidal nihilists?
OK, seriously, it's always possible that Eru thinks they will be better off turned into Davy Jones' Locker rather than sharing a life of sin with their naughty husbands, and maybe he thinks they'd be better off dead than living and ending up grieving said naughty husbands?
What I think is that Eru had gifted them Numenor which was close to Valinor and it turned out this was a mistake and he had to take it from them. But how could Eru get rid of an entire land mass without also hurting some of the people who lived there? Many must also have died when Beleriand was lost, so it's not like he hadn't done it before.
What's making me laugh (in a sick, twisted fashion) though, is how we keep on trying to justify it when really it
was sick. Why are we trying to do that? Tolkien doesn't. He just writes about it.