No, it is not the tragedy of the commons. That is about eating your seed crop.
Your seed crop (corn, you mean really) is a centralized private resource. It is guarded by the farmer. There is no common use outside of his *centralized* family. The blockchain is more like the office refrigerator. It is a public shared resource. Tragedy of the commons is an absolutely applicable concept.
As to doing a bunch of math for you, sorry no. I don't need to prove it to you. And at that I assume we are at an impasse.
Time will tell which of us is right.
I'd say we should have a decent idea by 6/28/2028