> There’s simply no such thing as a free market. Why we single out subsidy as non free is arbitrary. What activities constitute legitimate free market behavior? There’s no actual logically sound distinction.

Sounds like a nirvana fallacy. Yes, nowhere has a perfectly free market, just as nowhere has a perfectly corruptionless justice system and railroad tracks are never perfectly parallel. But there are definitely markets that are less free than others and actions that distort markets further, and it's right to call those out.