Yes, that is what I mean. If a chicken like that had good body type and vigor then I would be happy to have it.
As you say, it isn’t more difficult to breed for one thing or another. It is just different people breeding for different goals. My wife likes variety in feathers (which basically prevents me from ever breeding to the SOP). I want good production and I want my wife to be happy, so my breeding goals reflect that.
Not all Cornish are white. The laced varieties are beautiful.