Certainly a horrible ad. But it is for buying a machine. If such ads were the culprit, women shouldn't be driving cars either? I don't know what the ads were like at the time, but I am pretty sure they made similar ads for cars. Also not sure what kind of ads were targeted at women. It's pretty common to this day, although cheap, to just mix a random product with the claim "will make you more attractive to the opposite sex".

Wasn't it also the case that at first operating computers was deemed a task for secretaries, and then the perception changed?

I suppose they could have shown ads of secretaries being loved by their bosses because they work so efficiently thanks to their shiny new computers.

Edit: http://www.macmothership.com/gallery/MiscAds/AdamAd.JPG - women should just have used Macs?