Buddha said he would not support these extreme rules but if one wanted to follow that is okay except for #4, sitting under a tree during the rainy season. Buddha almost died starving his body to find enlightenment. A young girl saw him close to death under a tree and fed him some cows milk, saving his life. Once Buddha regained his health, he came to an understanding that denying and hurting the body hindered the process of enlightenment. Buddha went on to find the Old path discovered by Buddha's of the past.

Sitting under a tree during monsoon season would harm the meditator, so it was forbidden. Buddha would not enforce the rules, they were not mandatory. No matter what you wear, what you eat, dunking yourself in a holy body of water, killing animals for merit to the gods, how much ritual and prayer one will not free one from their conditioning and ignorance, from hatred, anger, and aversion. Buddha wasn't a superman, he was an average human like you and me, he taught we all can leave our self-caused suffering behind.