That was a really long way to say "Lots of people still use work as their only social engagement." and "Lots of people can't form a coherent thought long enough to write an email."
You're not refuting OP's point though.
The article includes the following quote:
> “I was shocked at how all the skills I had learned on how to navigate this type of environment in person evaporated remotely,” Kiersten said.
And also:
> “If I was sitting next to my manager, I could just have a quick chat and move on,” he said. “But I’m much less likely to Slack my manager and ask something because I don’t know what they’re up to at the moment. The amount of on-the-job learning has reduced dramatically.”
So the author managed to find the two 20 year olds who struggle with online communication and it's async nature. It seems clear that the OP makes a good point.