Department of the Obvious - Airlines

So I hear that the airlines are concerned that it is taking too long to board passengers onto planes. There are delays. They are losing time, time is money. So, didn't they help create this problem by charging fees for baggage? More passengers haul their bags onto the planes, waste a lot of time cramming suitcases, etc. into the overhead bins. There isn't enough room! It takes extra time! Duh!! How much money and time must be lost in delays before it is not worth the revenue gained from baggage check fees?