B.El.Ed. is better than DIET or not…??

B.El.Ed. after 4 years has equal status as DIET student after 2 years.
Even after 4 years of dynamic training in almost all aspects that are important to be an innovative teacher, we the graduates of B.El.Ed. are not eligible to teach middle school children for which we get degree for.Why not to do DIET spending 2 years rather spending 4 years for the same thing.