If you look into the life of the great scholars of the past then you would be amazed to find out that as great as their knowledge was they remained muqallids of one madhab.
I found this one by one of the learned member, Colonel_Hardstone
This is only on the fiqh courses. We did not even touch on the aqeedah.
Can you share with me an issue of Aqeedah that you heard the instructors mention at any of the courses, which goes against the aqeedah of the Ahlus sunnah wal jamaah?