In my opinion, and personal experience, it also has a lot to do with not having enough time and energy to think about anything other then putting food on the table
On the other hand, let's not pretend that we don't all waste time on Kardashians, Lemmy and other inane activities. I think the bigger problem is that we are overwhelmed with information, much of it inconsequential stuff, and that detracts from our ability to focus on and prioritize important but difficult topics.