Plastic explosives in ones shoe is hardly a comparative analysis.
Ah, but they're not going to write 1,432 laws to cover every nuance. It will cover "things that could blow up" not shoes, laptops, etc. Sure, specific things might be targeted, but there will always be the "catch all" language that covers the "including, but not necessarily limited to" list.
I'm certainly not in favor of searches for any reason or no reason at all, and taking your laptop for no good reason is outrageous!