Wudhu With Wet Wipes
While it’s true that most things in Islam can be understood logically, God’s claim is not that. Instead God’s claim is that Islam is based on fitrah (Quran verse 30:30). Furthermore, logical doesn’t mean that each person can interpret things in Islam based on their own logic. We must instead first understand God’s intent and then strive to find logical justifications for His directives. Quran verse 5:6 only mentions water; there’s no explicit requirement for running water. The temperament of the shariah is that if a directive cannot be followed in its original form or causes an undue difficulty, then it must be followed in its lesser form. If such lesser form is not directly available in the sources of Islam then of course ijtihad can be done. However, in case of wudu, God has already clearly given us tayyamum as the lesser form so there’s no need for any ijtihad.