If someone tells me that the sudden disappearance of powdered donuts would be an 8 on their scale, I'd say that's hard to understand for me. My life, nor the life of almost anyone I know, is inextricably linked with powdered donut consumption.
Similarly, I know a lot of folks who hunt, but that occupies less than a few percentage points, in terms of time, of their entire year. It'd be hard to understand how the loss of guns, where you'd still have bows and arrows, and spears, and crossbows, and other options to still hunt, would just devastate them.
I have a feeling there'd be an adjustment period, after which they figure out how to continue doing what they enjoyed doing, but in a different way.