You know what, I misread your note, and I went too hard on you there based off my misread. I apologize for that, feel free to dunk.
Yes pool centralization is a relevant concern.
The underlying hashrate is the more relevant concern because ultimately it's trivial for people with many different machines scattered around to point their hash at a different pool.
Bitcoin's mining isn't just centralized in pools, the actual machines are owned and operated by entities known to the government.
