Mildred, the thing I like best about MN is what you said about really getting to see inside other people's heads.
You are privy to so many other views that you aren't in real life and it can open your mind to all the other possibilities out there.
For eg, some people grow up with the defined roles and it is what they have been immersed in - the chances are that those women/men who don't move away or move in different social/work circles as they get older will meet other people who share their upbringing and viewpoint - and so it perpetuates.
MN is so diverse with women from all walks of life, SAHM/ft work, abusive relationships etc and you get such an understanding of people's motivations and aspirations - as well as being able to tap into other people's coping mechanisms and mindsets. You realise that you're not alone and that everyone has a 'game face' - lots of women who you would look at on rl and envy their self belief and presence express on here that even they experience self doubt at times (for eg). This, to me, is inspirational because it means we can at least begin to believe that we can all be that person -or strive to be at least.
I love that someone can post with their gripe about husband going to the pub/not cooking, and then a whole range of different viewpoints are presented - even if the OP still goes along with her husband's view, she's at least had her mind opened a wee bit to the possibility that things don't always have to be that way and she can make the changes in her life that she deserves.
(Hugely long rambly post, sorry - but I hope it makes sense!!)