The eminent Muslim scholar and renowned Da`iyah, Sheikh `Abdel Khaliq Hasan Ash-Shareef, states: “The basic ruling is that a Muslim offers ablution before Prayer in obedience to Allah and His Messenger (peace and blessings be upon him). When going for meeting dignitaries or important persons, one prepares himself well by washing and wearing nice dress and the like. If that is the case, what would it be when preparing to stand between the hands of Allah. Besides, water purifies one physically and is considered a purifier to the whole Ummah, meaning that along with the physical purification resulted from ablution it also had a spiritual purification. That is because the feeling that one makes ablution to stand between the hands of Allah gives inclination of this person to purify himself from all sins to stand between the hands of Allah.
Also, when looking at the organs that should be purified we’d realize that such places are subject to many impurities.
Moreover, ablution is an act of worship and we, Muslims, worship Allah as He ordered us and do not link acts of worship to reasons and wisdoms.
Finally, it should be clear that our issue with non-Muslims is not ablution rather the issue is that there is only One creator for the Universe and everything and He has the right to command His servants to obey Him. Therefore, we are obliged to obey Him.