Jehovah Witness question. If Jesus is actually Michael the angel why isn't the bible clearer on this issue?

It seems to me the entire NT is about Jesus time on earth, His teachings, His followers, His church etc. The OT spends a lot of time prophesying His first coming to Earth. Why are there only vague scripture about Micheal and Jesus being the same? It seems to me somewhere in scripture it would read..."Then Jesus returned to heaven and returned to being Michael" or "then the angel Michael left his Father to come to earth to be born as Jesus" ..Please don't list the scripture that is vague and not forthright to explain this. I would like to see a real answer from someone. Because christianity rests on the fact Jesus came in the flesh I really have problems accepting why scripture hints that Michael/Jesus are the same. Michael is only listed twice in the New Testament (Jude and Rev.) Why isn't the bible crystal clear on this? Thanks in advance.