That's surprising. In bulk, steel is a fraction of the cost of lead (usually, though at the moment the market seems a bit crazy). Is steel shot seen as a luxury product for hippies with money, or where does the difference come from?
And if you can use cheap ammo for practice, then I would guess the price of ammo for actual hunting wouldn't be very significant. A dollar extra per animal or something?
I don't really know, just trying to understand.
Anyway I have a feeling that you are radically over-estimating the size of the subsistence hunter population. It is a vanishingly small slice of what is already a tiny fraction of the American population. Last I heard only 3% of Americans ever hunted, and it was yet another one of those things that has a real strong positive correlation with household income.
If you really want to empathize with subsistence hunters then your beef is with wacko preppers. I didn't even notice the price difference when I switched to copper rifle loads but after COVID-19 started the price of a box of rifle cartridges tripled.
Working in tech, I can afford to buy higher quality and more expensive things, and the ammunition I use is no exception. But for many people it's not really within their budget. Lead is cheap, it's one of the main reason its used to make projectiles in the first place.