One has to be competent and have a high level of understanding to interpret the Qur’aan and Hadeeth. It is not the field of anyone and everyone. Some are geared and made for the field of hadeeth, and some for fiqh and interpreting the hadeeth. Such people are worthy of following. Look at a simple example. Everybody accepts Imaam Bukhaari (rahimahullah) as a luminary in the field of hadeeth, but he was not recognised in the field of fiqh. Therefore, we will find that Imaam Tirmizi (rahimahullah) who was his student, yet when reporting the views of the fuqahaa regarding a particular hadeeth he would enlist the names of Imaam Shaafi`ee, Imaam Ahmad (rahimahumallah), etc. yet he would not report the view of Imaam Bukhaari. Hence, for each field there are different people who are qualified and experts, and they are the ones who are to be followed.
Source: Al-Haadi