what if someone proposed a vote about how much of your money we all get to have? Would you vote in that poll?
People with commit access to the repo don't own the Bitcoin network.
Anyway the final decision will be made by bitcoin holders. If miners will support some nonsense BIP the people who disagree will cease using the system by "voting" for alternative stores of value. The purpose of suggested poll is to opportunely prevent this development.
Allow me to understand: is it a blockchain fork you want to prevent? (not Core vs XT, but BIP vs BIP?) Your idea is that the miners will have accurate information about the will of the users, and choose that option unanimously?