The Arab revolt was a joke, which did nothing but tie down a few Torkish battalions in an otherwise inactive theater of war. Rafael de Nogales, a mercenary officer who commanded a Turkish cavalry division in Palestine encountered Lawrence's men on a number of occasions. In his memoirs "Four Years Beneath the Crescent", he expresses little but contempt for the Arab raiders. So long as any Turkish unit maintained a semblance of order, the Arabs would run away. They were bandits, nothing more. This is evident even in "Seven Pillars of Wisdom", as most of the serious battles are not fought by Arabs, but by Muslim troops of the British Army brought to Aqaba from India.
True, Arabs are cowards.