because then the mining pools would follow the fork or not get their transactions/rewards seen by the services
Because there are many validators and miners and developers outside the US (BlockRock) custody. Which means why would they accept BlackRock offers it would be like killing a goose which was laying golden eggs. Means why would someone kills the value of decentralization for some money while they can earn more than those platform offering them money.
clarification
miners are asics they have no hard drive. they store no code to check for rules. they just hash. they have no vote
POOLS manage the block collation of transactions and format. and its the POOL that has some form of vote.
if a group colludes to say that the majority of economic services will ignore a pools blocks if the pool abstains from a change. then the hashpower of miners would jump to pools aligning to the change and the pools give into the change to retain the hashpower and ensure their blocks(rewards and transactions) are seen by service so they can spend funds
as for 'validators'
again due to a trick of "backward compatibility" nodes do not need to upgrade their note to be compliment and accept a change.. meaning they do not get a vote.
instead the main vote is the economic nodes(popular services) that use a certain code that wants to do certain things and ignore other things..
when the only node brand that has been deemed the central point of failure of being the supreme leader and only reference client to offer changes. offers a change in collussion with economic nodes. which then blackmail pools into following or have their blocks ignored. you soon see the power play
now look at the 2016-7 events of how the NYA caused the only 45% acceptance of a protocol change(nov'16-june'17) suddenly jumped to an unnatural 100% acceptance(july'17) which cause the change to activate(aug'17) even when majority of network validators were not even running the latest software.. but the economic node and pools were flagging to let it happen out of fear/threat of having blocks rejected
in short yes it has happened. and there is code and blockdata to prove it. even though social trolls pretend it didnt happen by their silly stories of denial by use of asking their buddies to quote to each other denying it.. (echo chamber)
so check the block data, check the code of events(immutable data) of 2017 and the NYA and see what actually happened. and realise if DCG(nya) can do it then so could blackrock, using the same tactics
and yes we should be aware of risks. not deny risks. we should scrutinise those in power not treat them like gods..
here is a thing to learn
DCG has its own ETF application and so the comparatives of mission and motive can be seen between what did happen vs what could happen that benefit a business and their corporate partners (DCG or blackrock)