If I understand your question correctly, then I will try to give you a simple explanation. Miners are maintenance personnel who receive money for their work. In fact, everything has already been decided and agreed upon, if you, as a miner, think that you can influence the vote, then you are wrong.
Most miners want to be rewarded with marketable coins. If some pools do not want to update the software, then they will mine a new and useless coin. Miners will leave these pools and pool owners will receive burn notice.