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
The typical example is a shared field of grass for multiple households. Anyway this is a waste of time, read up on it. And then spend some time thinking about it, that's actually the most important part.
There is no shame in saying "I don't know", by the way. I keep hoping to be able to type those words with every post here. But nobody will give me a chance.