miners spend millions on electricity and hardware to mine blocks. they get rewarded with new bitcoin and transaction fees. but that reward is worthless if no exchange or payment processor will accept it. the economic nodes - exchanges, wallets, payment processors - are the ones who give bitcoin its value. miners follow them because miners need to sell their rewards. p2spkh works the same way taproot did: get enough economic nodes to enforce the new rules, and miners will upgrade to avoid mining blocks that the economy rejects. you don't need 51% of miners. you need 15% of economic nodes. the miners follow the money.