> there's no way to make your data anonymous and usable by the third party at the same time. The
This is absurd hyperbole, here’s a trivial proof. The US population is 51.1% female. If you live in the US your gender information is included in this data point, but it cannot be de-anonymized. It is however useful for determining TAM for many products.
Anonymity is a spectrum, and there are many points along that spectrum which are solutions to usable data which also respects privacy.
Privacy is a spectrum, anonymity is not.
The EFF is completely correct in their assessment - there's no way to make your data anonymous and usable by the third party at the same time. The root issue lies elsewhere.
There's FHE, which does allow your data to be processed without accessing it, but it has prohibitive compute requirements and isn't practical for most purposes. I'm not sure if it allows the data to be usable enough without revealing it, either.