So they should be a man, basically. You can put the same message in different words, but the meaning stays the same.
I think this is a bit naive and also insulting to say the topic would be about self-image in the first place. The economic realities have changed, sure. Former skills became irrelevant, others more important.
Still, in the grand scheme of things, for the relevant group not much has changed. Go to work or perish is as as true today as it was in 1970. Just that the middle class shrank considerably and people are not able to afford housing or significant luxury. That has indeed changed and has nothing to do with men/women in particular.
> Now, unlike many men working in factory jobs, the male nurse is solidly middle-class.
Not really. Nurses are not paid very well for the work they do. The article claims they would be middle-class. But only if you change the definition from the definition 50 years ago. Again just a worsened economic development.