I'm not sure how the centralization improves the resilience of the implementations. Mining pool centralization is definitely a big downside for security on the blockchain. A lot of research is being done in cryptocurrencies looking for ways to discourage this type of centralization.
centralization doesn't, that wasn't a claim I was making or considering
mining pool centralization has ebbs and flows. I'm not concerned about bitcoin's TODAY for example, but maybe tomorrow and at times in the past. There are a lot of blockchains people don't put under much scrutiny, where it turns out there is massive centralization. But this isn't an inherent problem, Satoshi was 100% of Bitcoin's network for a long time.