There’s noise as well as signal for sure but I maintain that marriage is absolutely a useful fitness filter. At the very least, at least one other person has agreed to enter into a long term relationship with them. It will filter out unsocialized basement dwellers, for example.
Sure, there are drunken Vegas marriages to strangers which fall apart 24 hours later, but I think those are the exception.
Sure, there are drunken Vegas marriages to strangers which fall apart 24 hours later, but I think those are the exception.