Re: Having a hard time understanding madhabs
None of the madhabs considers the other to be a separate sect. We all pray together without any problems. When we have people from different madhabs praying in a single congregation, they’re all accommodated. For instance, the Hanafis don’t need to do an individual qirat (reciting of Fatiha + surah) in their salat, whereas the Shafis do. So when Shafis are in the jamaat, the imam slows it down to allow them enough time for their qirat.
Whatever any of the madhabs follow are based on accounts of what Nabi (SAW) said or did. One of the functions of the madhab is to analyze the different proofs and then see which one should be preferred over the other. The 4 imams had their own systematic methods for according preference to certain proofs over others.
Following the imams is following the Qur’an and Sunnah. The imams differ in matters where Qur’an and Sunnah don’t give you something conclusive. So the matters you mentioned like trying hands in salat, performance of wudhu (though, it’s more the things that nullify wudhu that they differ in). So you’re right, if Qur’an and Sunnah are clear enough on any subject, we don’t need to follow the imams for it. If that were the case for any given matter, the imams themselves would not have differed on them either.