I agree with you
@Bokanovsky on this. I think the invention of the oral contraceptive was the biggest obvious factor, but you also had the parents of the Baby Boomers, who had just come back from WW2, with millions eradicated and millions more traumatized (although nobody talked about that in the 40s and 50s), and those families were desperate for a type of normalcy they could only imagine, but set about doing.
So everybody spoiled their precious babies rather than taught them how real life is. Those men had seen real life up close and personal and wanted to shield their children from it at all costs. Which raised the terribly entitled Baby Boomer generation (that the introduction of oral contraceptives coincided with.)