The Royals work so hard and as such are entitled to all the privileges they receive including nil taxes; certainly harder than GP, teachers, nurses, teachers, rocket scientists, cleaners, careers and refuse collectors.
So why after granting Royal Assent (passing laws) to make wills of the commoners public after probate, do they make such an effort to hide what they worked hard to obtain?
Commoners must simply be unable to comprehend it and it's hidden for their good. More so, commoners cannot be trusted so theirs must be made public documents.
Late Queen intervened to ensure minor royal’s will was suppressed (telegraph.co.uk)