I would like to share an hypothesis.
With enough asics a group of miners could offer/sell an alternative to SWIFT for banks?
The group could settle a secret agreement with some banks to raise a few billion US$ for their hash capacity (they would have to leave bitcoin).
That's a nice business idea for mining facilities like BitMain. But why do you think they need to destroy Bitcoin for that? They could just create new asics with new algorithm for the bank coin in parallel. Would be the far easier and more profitable.
And why do you need to spin such theories to explain the simple fact that miners want more onchain scaling?