Because the practice of giving everyone an opportunity is extremely inefficient as opposed to going with the people best for the job to begin with. If this was normal practice nothing would get done, there would be no progress, and we would all be hunting and gathering for our food right now. Case and point, how many deadlines has this game missed? How much bullshit have you had to put up with? How many complaints have you had to read through? How many times have I had to become a loudmouth and raise my concerns? Progress isn't about being nice and giving everyone an opportunity, and as harsh as it sounds, this is the way of the universe and it is unavoidable if you want something done right.