Oh, I do agree with you. I don't think it gets quite as cold in my climate, but it's my version of cold. Our first snow is usually around Thanksgiving.
I gather leaves in fall where I have my vegetable garden and haul them home simply because I don't have enough trees on my home property. Yes, I shred them and re-mulch the garden so that the material will decompose and feed the soil. The spring mulching, which also feeds the soil, is primarily to hold moisture in the soil through my high summer temps. Those high temps will decompose those leaves almost completely before our first frost date, which is around the end of October.
I cannot grow vegetables in my home garden because of the high heat zone, the higher elevation which impacts the quality of the light and because of the aspect of my garden which traps heat and the lack of fertility of my soil. They grow food crops in Arizona and even the central valley of California which certainly has high temps, so heat is only one of the factors that impairs my ability to grow a lot vegetables in my home garden.
I agree with Hazelnut that our food chain has been horribly contaminated and producing our food is important. I just wish I had more land.
Smiles,
Lyn