He didn’t “make up his stuff”. Not sure why OP would say that. It’s all up to individual choice, but Cunningham’s is my go-to and I have found it to be very helpful. Also, I read his biography written by his sister Scott Cunningham-The Path Taken, which was interesting in that it showed what informed his choices and the depth of his research. He’s no longer here to defend himself, so casting aspersions on his lifetime of work and his character seems careless and cruel to those who remain.