Looked that up thinking I'll disagree, but actually yes. As you grow in your role, you get to a point where the number of incoming "quick requests" outpaces your ability to keep up.

To most people they're just asking for a quick 10 minutes of your time, what's the big deal. But they don't see the other 20 people doing the same thing. If you devote 200min+ of every day to fulfilling others' requests, when will you have time to do your own work?

The problem grows only worse the higher in the org chart (formal or informal) you get.

Someone like a VPofEng may have 100 people asking "quick questions" all the time. Without the Wally Deflector, there's literally not enough time in the day to even have all these conversations, let alone do anything about 'em.