Why are we restricted to only 6 bases per continent?

This is so unrealistic and limits the expansion and game potential for individual airlines so much.

Take a look at the most successful airline in Europe. They are called "Ryanair" who offers cheap €0.02 routes everywhere they fly! This airline sees high load factors and is popular with the people. It is the "peoples airline" because it is so affordable. They just opened their 25th base (in Birmingham) and have over 100 Boeing 737-800s on order.
If AM is to be "realistic" as people call for greater realism, we should be allowed to have at the bare mininum, 25 bases where we can fly out of. Even better would be unlimited bases. The mininum price should also be reduced to €0 with price increments to €0.01.
/end sarcasm.