Yes, you got what I meant second time - I should have been more precise. And I understand the "block time" issue - it's a statistical measure of the effect of hash difficulty and available hash power and difficulty is adjusted every X blocks to approximate to the mean 10 minute block time, right? (I've never read the code but that was my understanding).
And I understand it requires a hard fork vs. soft fork, but for miners why wouldn't they go with it. More stability for the net, no change in revenue, and since it would increase TPS capacity for BTC and decrease mean confirmation time it would make BTC more competitive with ETH as a utilitarian payment system vs. "store of value" not traded often. Although personally, I think all the work on payment channels and off-chain settlement is the way forward there.
I wish that more people would look at the work being done with Tezos where the consensus protocol is part of the blockchain - which makes it easy to change the rules within the system itself. And a "do-over" is possible - again with consensus.