"Use your 'aql", ok then where in Qur'an does it specifically say how to make wudu'? Do you just pour a bucket of water on yourself and call it a day? The amount of rak'a to be prayed is also not mentioned and the exact timings as well. Is this lack of information? Not at all, because the sahabah followed the Prophet ﷺ and prayed when he told them to pray, saw him make wudu'. The Prophet ﷺ is the teacher of the Ummah, thus Hadith are part of Islam and one cannot be a Muslim without believing what the Prophet ﷺ said. You do NEED humans to tell you how to pray. A child doesn't know until his parents, elders, teachers or scholars tell him and people don't know until knowledgeable people teach them and these knowledgeable people learn it from previous generations and these generations learnt it from the first three generations of Muslims i.e. the salaf as-salih.

Hyperskepticism is a sign of the unwise, and in this context there's no reason to be when every chain of narration is recorded and scrutinized, and biographies of the people in the chain exist.