It's worth trying to improve ETH client diversification so no single client is above 66% but let's not forget Ethereum is the only L1 that even have multiple clients.

Sometimes Ethereum is judged by weird standards relative to everything else because it's doing hard things.

Isn't it more the fact that we went through a lot of effort to have a multi client system, so if there is a majority client and it has a bug then we are no different to a single client chain? If you're the best you don't compare yourself to the second best. you compare yourself to yesterday!