I think having time and opportunity to be bored is actually a luxury that many have nowadays. Growing up in a village where my grandma was basically doing subsistence farming, I recall that she didn't have that moment to daydream. This was not uncommon some time ago, as this great post from last week about labour movement was mentioning [1].
Given this, I find that daydreaming is in a way an expression of a freedom and luxury that we have. I find myself starting to think deeply about some topics in those moments. Spending that time on a smartphone/social media is wasting a freedom that we have. I used to check news or watch something more frequently before I had this realization and not doing that has greatly improved my state of mind.