First, sliding on the runway may hit a foreign body. There was a Concorde plane crash in America. The reason is that when the plane took off and taxied at high speed, the tire that fell on the front machine burst and the debris hit the fuel tank, causing the plane to catch fire. No one survived in the end. Two, taxiing, flying at low altitude, easy to collide with birds and other birds, causing accidents. Third, the low-altitude airflow is unstable. In low-altitude flight, the influence of pre-strong airflow makes the plane rise or fall sharply. Due to the lack of altitude, the time left for the pilot to operate is relatively short. Finally, I wish you peace.