The point we are (well I am) trying to make is that the lower time pilots in the cockpit reduces the level of safety. How would the passengers feel about knowing half their crew is wet behind the ears? Sure you may handle the simulator scenarios quite well, but what about a new or more complicated emergency situation? (multiple system failures etc.)
A jet is a complex aircraft moving quickly through the sky, in the US typically a new commercial pilot initially flies a single engine, then twin piston then maybe turbine later. That makes for a good stepping stone way of learning larger, faster equipment and also exposes a pilot to decision-making and handling many different situations. This makes for a well-rounded pilot and I think superior to one that has only flown in a training environment and crewed aircraft where most decisions are made for you.