My mum went back to work when I was 13 and db went off to boarding school. She was far more fun when she'd gone back to work as she was having adult conversations, and was holding her own financially. I don't feel damaged at all, and was glad that she was a civil servant as when my Dad left her when they were in Gib with the RN, she could come home and get her job back.
I've done it the other way - I went back to work when ds was 6 months old, on a job share, but paid a fortune in holiday care. I retrained as a teacher when he was 5, and worked fulltime, but am now a SAHM as we have moved abroad. DS likes me being at home when he gets in from school, and seems more settled now that I'm not working.
I'm involved in his school, and both attend and teach various classes here. I'm applying to start my MA in January, as I now have the time and funds to do it properly; not by tagging it on to the end of a long and hard working day.
I think that being a WOHM and being a SAHM may be suitable at different times in your life. There is no one size fits all here. I am taking time now that I couldn't when I was younger, and appreciating it all the more, especially as I am intrinsically lazy and can cheerfully wile away a day on MN, or reading a good book.
The bottom line surely, is that we all individuals and different things suit different people. What does unite us all is that we are mothers, and trying to do the best thing for our families. We may not agree all the time, but it would be a dull world if we did. We should be supportive of each other's choices as we don't know the circumstances behind them.