Not according to Vince Gilligan, the person who created and wrote the show. Baby Blue was the meth. The last thing Walter White did was walk through the meth lab admiring the set up he and Jessie built. The very last thing he did was touch that piece of meth equipment lovingly, marking it with his blood. He loved the power, the control and the recognition cooking the perfect meth gave him.
It cost him his wife, his children, his name, and all their futures. The son who used to adore him, now hates him and will have to live with what Walt did for the rest of his life. His baby daughter will never know him. Walter White gave up his soul for the meth and all the money he left his son won’t buy any of it back.
Of course baby blue was the meth. It was a means to an end. If it wasn’t meth it would have been heroin..loan sharking...hit man.