Why so many rules to follow within days of getting a Sak Yant.

There are a lot of rules that might not make any sense to a western thinking, like not eating star fruit. The logic behind it was from when you have to pick the fruit you eat and if you have ever been under a star fruit tree, They do tend to be dripping acidic sap and also covered with spores and molds on the trees, All of which are not good for open soars like new tattoos. So in spite, it sound weird there is often based on logic. Same with Banana trees. Many are just hygiene rules

Some rules are to act as reminders of rules or etiquette, that spiritual people should practice at all time.