Why are people blaming miners for anything ?  Bitcoin is based on mining. 

Mining centralization is based on electricity and manufacturing costs . not related or correlated to blocksize.

Miners are the ones securing the network, so its their decision how to vote with their hashpower.  Developers can write code
but they can't force anyone to use it.  And if you don't like the coin that the miners are mining, you
are free to use another coin.