> Most everyone I know just sits on their phones, computers, or TVs a good portion of the day. All boredom is banished,
I see this a lot too, but I disagree with the conclusion. I think more people are bored today than have been before. (How many of you browse Netflix or YouTube, jumping platforms, thinking "there's nothing to watch") But we need to recognize that engagement does not mean a lack of boredom but rather addiction. As the article points out, people are substantially more risk adverse now.
While that may be good for things like less people doing heavy drinking and such, our lives are inherently risky. If you talk to people about why they have a hard time making friends you'll find that this risk adverse nature often pops up (not the only cause, but one of many). Same with dating. Any type of relationship is inherently risky. You WILL get hurt by some of them too, but that is the price to pay for the high rewards of successful relationships (which can form online).
So I am in agreement that there is a "why risk it" aspect of people, but not about boredom. I believe we are self isolating because that's what animals do, especially depressed ones. If our lives are comfortable enough there is little incentive to take any risks. So it sounds weird, but I think a major part of the issue is that our lives have become so well off that there is fewer incentives to push ourselves out of our comfort zones[0]. But we are human too and able to find challenges for ourselves and create discomfort when there is none. This is a double edged sword that is difficult to wield, but I think it is important that we learn it. It is how we better ourselves: putting ourselves in uncomfortable positions[1].
[0] I do think this also plays a role in the (global) rise in authoritarianism, but that is too much for this comment.
[1] Even doing things like learning to code, ride a bike, or learn an instrument requires putting ourselves in uncomfortable positions. Specifically because you're never good at something when you first start. But the challenge is supposed to make us stronger.