You say that like the distractions are exclusively outside. I'm not the person you're replying to, but if I close all my blackout curtains, turn off all the lights, and turn off all but the white noise, but I'm not sleepy, my mind will go in a thousand directions at once.
How do I or anyone else explain that to you? The challenge is in the brain. It's not an outside force. There is no boredom.