I don't think it's the drugs.
I used to do cross-country backpacking. The kind where you go on multi-day trips out in the wilderness, well out of the range of any technology (except GPS). What is remarkable about such trips is exactly the type of detachment that the parent describes.
It also gives a profound sense of perspective. You kind of realize how inconsequential your day-to-day concerns are. You know, stuff like trying to not be late to morning stand-ups or vertically centering the text inside some div. You realize how small you are in the grand scheme of things. The forests and rivers and mountains existed long before you were born and they will continue to exist long after you die. In their eyes -- if they had eyes -- you don't matter. You're less than a speck. You're nothing. Then when you lie down in your tent that night and the only thing you can hear are the sounds of nature around you, what happens is that you stop giving a shit about your "default" life.
Several days later, on your way back to civilization, your phone beeps and you realize you're now within range of a cellular tower. Annoyed, you punch in your passcode to silence it. Oh, what's this? Your friend texted you two days ago, inviting you to a house party on Saturday. Better respond real quick so he doesn't think you're ignoring him. And maybe check email while at it, too.
And that's how you get sucked back into bullshit.