What is the wisdom behind the dislike or prohibition of delaying the Fajr prayer until after sunrise?

Allah has ordained five prayers at specific times, including the Fajr prayer, whose time extends from the appearance of true dawn until sunrise. These specific prayer times fulfill great wisdoms, among them: distinguishing the obedient believer, maintaining the servant's connection with his Lord, renewing one's devotion to Allah, seizing the blessed time of dawn, accustoming oneself to activity, and thanking Allah for the blessing of the day. Furthermore, prayers instill a love for order and respect for time. The ultimate wisdom in all of this is obedience to Allah and His Messenger, and the realization of servitude to Him.