How come all legal documents, including laws are written in Legal Jargon?

Most common jargon in property:
Question by spaceshotx7: How come all legal documents, such as laws are written in Legal Jargon?
I notice that all laws or legal documents are written using complicated Legal Jargon that often youngsters might not comprehend. How come Laws and legal documents have to be written a specific way, rather of being written normally? For example: Legal documents such as complicated words like notwithstanding, hereafter, shall, provision, etc. If any person is a lawyer,

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