Ordinarily when you pay $350 for headphones it is assumed that the vendor has already invested money in doing R&D to make them work properly and isn't planning to do testing on you without telling you or compensating you for it, to enable the functionality you already paid for.

I bought headphones, I did not sign up for a research project.

We went from paying for software to getting it for free in return for our data and now we're apparently giving over our data even for physical devices that we pay top dollar for.