minimum amateur championship level up to pro.

I believe much of the disagreement in this thread pertains to the perception of the qualitative word 'good'...which is the basis for the OP's question...define good. Good 'may' cannote some level of accomplishment to achieve good status...but perhaps not.
For example, my non cyclist friends consider me to be a good cyclist...because I am the fastest guy on 2 wheels that they know...when we go out on recreational rides for example. I consider myself however to be middle of the pack among avid riders. I sometimes think I maybe better than middle of the pack, but believe that to be wishful thinking...depends on the pack.