Coiny refresh

[tigerw]

Why do I feel so dumb for not coming up with this natural system earlier?

Don't feel dumb.

But if you want to know why you feel dumb for not coming up with this system earlier, perhaps it's because you didn't come up with the system earlier? You posed a sort of self-answering rhetorical question

Or maybe you are referring to the chemical processes inside your brain that trigger you to feel 'dumb', and why and how they activate when you experience something suitably 'dumbing'?