Crying is an expression of bottled up emotions, not an acceptance of defeat. Someone can cry and be invigorated to try harder to deal with their problems or they can cry but still be supportive to their spouse and provide emotional stability.
Womens' reactions are dependent upon their personality, their values, their view of the other person, the environment, their current emotional state, their biology and a lot of other factors at any given moment. This explains the fact that some people in this thread talk about how their crying led to more fulfilling relationships why others talk about break ups and loss of trust.
Even the point about children is completely arbitrary. Will children feel that their family won't survive due to their father crying about a lost relative? Doesn't it depend on their age? Furthermore, children need to see that their parents are humans and how to express their emotions. The alternative is that they find more indirect ways to do that like alcoholism, abuse, self-harm, extreme escapism and many other banes of today's society.
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Edit: you've broken the site guidelines so badly that I've banned the account. Please see https://news.ycombinator.com/item?id=34669955.
You covered some reason for it on the woman’s part. While he (OP) seemed to only be talking about the man’s reason (motivation) to not act like that.
And when she can no longer rely on you being the same person as you have been for 5-10 years, then she might not think rationally.
Of course, rational thought would say "he's been good for so long, this is probably just temporary, I will help him through this" but are women generally known for rational thought?
That's beyond the pale and we've banned the account. Please don't create accounts to break HN's rules with.
Look from their perspective.
"My man is so smart, competent and emotionally stable. I can rely on him for anything!"
"Oh no he's crying, does this mean our family won't survive? What do I do?"
It's not anything more complicated than that. Women can probably chime in to tell me if I'm right or wrong, but this is a human perspective, because children will feel the same way if the father cries.