I have thought about this for this entire year since my bomb drop. I can't give you a definite reason for any of this except to say that we are all different. We process and react to things differently. Some of us have a strong faith that helps and some think they can do everything on their own.
I think MLC is very different than depression. For instance, my h has suffered from depression for most of our marriage. While he has been the negative one....we called him BA (for Bad Attitude) from the character in the old A-Team show. That and Eeyore from Winnie the Pooh. Any time my husband would start that gloom and doom stuff I would try to snap him out of it, but I could only manage to do that sometimes. And now that I look back on it, I realize how exhausting it was to keep trying to lift his spirits!
The other day my h told me he has always gone by the idea that he always expects the worst to happen and that way if it's better he is surprised. I was flabbergasted that he said this and furthermore that he said it's what his family lived by. I said Bingo! Now we know where your problem and stinking thinking started. He didn't understand that. I explained to him that by thinking and expecting the worst in everything in his life, he will only get the worst. I said, you reap what you sow! I told him if he thinks people are mistreating him or everything he does will fail, that's what he'll get. And once a person has that attitude, they stop looking for anything positive to come from anyone else. My h said oh, so you go skipping around in life thinking everything is coming up roses? LOL! I told him I strive to think the best about a person and to believe that everything will work out no matter what the situation is. And I reminded him that if I didn't do that, why in the world would I even be talking to him?!!
Even though medications work, a person isn't going to change their negative thinking without learning new behavior. We have to get rid of stinking thinking. I actually believe this negative stuff just becomes a habit...it's a way of life. A person needs to create a new habit.
Two books that I have read on this subject that have been tremendous help to me are
Battlefield of the Mind and
Power Thoughts by Joyce Meyer. She writes these from a Christian perspective and I have no idea if you are comfortable with that or not. In my own LBS journey, nothing helped me more than these books. I found myself carrying them around with me and reading passages over and over again. Whatever battle I was having at the moment, I would find a chapter that covered that. So, I would read it again to get those positive words in my head. And it works! Just like the other way of garbage in, garbage out works for cementing negative thoughts.
As far as why don't our MLC ers do this instead of blaming us and doing all this damage? That's easy to answer. Because it's easier for them to blame us so they won't have to look at themselves. They don't want to admit anything they've done wrong because then they would have to admit they've screwed up. They have to want to change. Until they get that want to, change will not occur.
The therapist I went to see told me that men are the worst at change and talking to anyone about their depression. Their idea of talking is to simply say to a guy, "yeah, I'm having trouble with the wife." Then the other guy will say," been there, done that. Good luck to you" as he gives him a hit on the shoulder. And they're done! They think that's really talking out a problem!
Women are wired differently. We are fixers, problem solvers, relationship healers. We see a problem, research the reason, and seek out a way to fix it! If that means we need to talk to a friend, pastor, or therapist, we do it. If it means we need to read books and change ourselves in order to see change in the other person, we do it. If it means we need to pray more, we do it. We will try anything to get to the bottom of the problem, because we have that built inside of us to mend relationships.
Now, I realize there are men who don't go through MLC and there are women who do and therefore you see the opposite in their actions. But, this is just a general explanation of how men and women are different. And since it seems people in MLC act like they've been abducted by aliens, they can act in every which way. Nothing they do is rational anyway.