You have been informed, but not addressed the fact, that Bitcoin is not like Ethereum.
Current Bitcoin difficulty will kill off any chain with 10% hash power.

Unlike Eth, a Bitcoin chain with 10% hash will be unusable, and unsustainable, for a long period of time.
When a 1mb block is mined on your 10% chain, every hour or two or three, for months on end, very few users will be able to move any coins.

Just imagine the size of the Core dynamic fee!, the mempool congestion, the spam, the endlessness of delays.
(ok, I admit, that sounds like the current Core road map anyway, but think again. it's even worse!)

Bitcoin difficulty is not like Ethereum difficulty.
Please stop making out it is, or explain how.