I don't think that's obvious at all. The price charged for inference is subsidized in the sense that they don't charge a rate that actually makes sense if they want to be a profitable company whose main product is selling inference. If they did want to be profitable, obviously they'd charge much more for inference. Hence, people are saying it's subsidized.

No sorry I don't think what you are saying is correct. There's a clear difference between saying "companies are losing money on inference" and "companies are not profitable". One is about unit economics and the impossibility of ever becoming profitable.