[prasanthmj]

It seems to follow the notion that more comments = better code. If the symbol names are explanatory enough, the code itself will be self-explanatory. Then all that must be commented about will be special cases handled/not handled and why a certain decision is taken about handling in a certain way.

Often, "every single line is commented" results from blindly following a certain "Standard" that demands that. Eventually generating meaningless comments all over the code. Then the important points never gets mentioned in the comments or just gets buried in the noise.