It may not directly negotiate the prices of food, and that's fine: If there's another form of intervention that would provide healthcare to people without directly negotiating the price, I'd be fine with that too. However, the government has not subsidized the healthcare industry to the point where healthcare is as accessible as food.

Healthcare is not just a demand-side issue. There is also constrained supply. I'd be happy to see the government subsidize supply production (building new medical schools etc) in a similar way that it subsidizes food production.

I'm by no means advocating government negotiation or single-payer or medicare-for-all as the thing the government must do on this issue. I'm fine with a form of intervention that allows the market forces to go the last mile in this.