The game theory buddy.
Bitcoin nodes / Bitcoin node runners define what Bitcoin is. We do it, the Bitcoin node runners. Miners must create Bitcoin compliant blocks but its the Bitcoin nodes that enforce the Bitcoin rules.
If Bitcoiners want Bitcoin to become shitcoin full of spam and centralized just like Ethereum and Solana it will happen.
But if Bitcoiners want Bitcoin to continue be Freedom Money - THE Global Most Secure Decentralized Unconfiscatable Peer-to-Peer Scarce Hard Sovereign Permissionless Freedom Money, The Greatest Store of Value and The Strongest Hope for Humanity then it will happen despite all the attacks from governments and agencies.
We need to hold the line with BIP-110.
If few miners that are controlled by governments decide what Bitcoin is then Bitcoin is already centralized and they can do whatever they want - increase the 21 Million limit, increase block size, centralize it more and more, ban certain transactions.
But its the nodes that enforce the rules.
You can read this part or better the whole artcile from the start.
https://melvin.me/public/articles/bip110.html#last-minute
Here you can read why Bitconi nodes are enforcing the rules.
https://medium.com/bitcoinerrorlog/who-secures-bitcoin-95b19bbcda3c