Oil would be pretty much the same. Ag would be a chaotic disaster. The subsidies for ag were written in blood based on the need to smooth the natural forces of extreme cyclic market fluctuations that affect all inelastic commodities.
But a society cannot afford those cycles to play out for their food supply. Prices need to be stable and we need a slight oversupply of staples to be robust rather than perfectly efficient.
I’m not saying the subsidies are perfectly dialed in and that there’s no waste or pork. But some are very very necessary.