Why is it awful? My father had a really interesting job, well paid and diverse, and a happy family well cared for by my mother. Seems like a pretty good set up to me. I've not achieved it yet (need a slightly better job), but I'm not doing so badly.
I've always believed that my mother could have succeeded in whatever she chose to do to (she is very successful in running her charity right now, winning grants from all over the place, which is quite a skill). But she maintains that she was at her happiest being a SAHM.
I'm not quite sure why you think my dh could claim a better rate of pay than I do, it's not happened yet! In my experience pay is related to skills, experience and qualifications, and in my field dh has none of those (likewise I wouldn't do terribly well in his field, but as I get paid better in mine why would I?).
Yes there is a pay gap between men and women taken as a whole. And yes it should be disputed, and where discrimination occurs it should be fought. But there are many fields where there isn't a pay gap and it's pretty stupid to say that all of our husbands earn/could earn more than we do, because that's not going to be true.
As to walking out on your family and not paying maintenance, well any parent can try to do that can't they, and the CSA etc will do their best/worst to chase them.