I struggle, I think I'm most people: First, I procrastinate getting started because of all the things that I should be, want to be, or am doing. Then I start and its like taking the lid off a boiling pot of to-dos and thoughts that have been suppressed in the constant busyness of doing stuff. I want to attend to them all now, but I deny myself. Then I want to at least make sure to keep them all in mind so I can attend to them when the exercise ends, but I deny myself. This struggle boils up and down until the exercise is finally over. I get a few moments of peace of course.

Sure, I spontaneously zone out sometimes, but purposely meditating is always the experience above.

I think experiences vary depending on person and personality.

I'm fine with doing nothing for a long time[0], but know friends and family members that struggle with not filling idle time with their phone. I do think this is learned behavior that people can adjust over time with practice (i.e. meditation).

0: I'm a voracious reader, frequent solo traveler, and was a paid photographer for a bit. Sitting, observing, and thinking is something that I do on a daily basis and comes naturally to me.