Both you and the author of the blog post assume that rationality is better than being able to show our emotions. The scientific paper doesn't say anything about it.
A few decades ago we expected women to "show emotions" and men to be strong. We are now trying to change this cliché since it hurts all of us. What we see in the paper is that this change is taking place. I think it's good news.
The idea that rationality was more prevalent until the 1970s since we "believed in science" is compelling. Since the 1970s we focus more on our emotions as you say. What's interesting is that this change took place before the era of social networks. Social networks might be an amplifier but it's definitely not the root cause.