The message I would imagine, is probably more along the lines of; "Hey! Buy our game! It's fun!" and not so much "Games or for men, women should be in the kitchen washing dishes." They aren't "reinforcing" obvious anything. They're trying to sell their product to you. If their marketing research concluded they could sell more games by putting a picture of two hyenas eating a toddler on the cover, that's what you'd see.
The point of advertising is to get as many people as possible to buy the product you are selling. There is no other sinister underlying social agenda at work. Hasbro, Milton Bradley, or whomever could give a shit less who does the dishes in your house, or who earns the bulk of the income, providing some of it gets used to buy their product(s).
All of which is as true then as it is today. Just as people will find offense in anything if they just look hard enough. As Sigmund Freud famously said; "Sometimes a cigar is just a cigar." I would say most of the time...
