It's because the Su-27 got low-pressure tires, as most Russian aircraft do due to the bad runways they got in Russia. The pilots don't have to "tap" the brakes. First, you got a drag chute, which should be used for all your landings. Second, the real plane got a brake pedal. No button as you do. So they can apply as much brake pressure as needed. You could do that too if you got rudder pedals.