There are lots of features and add-ins for Jira. I'm sure the list can be searched or browsed.
Can you filter out any that can only be performed by administrators?
I don't know the ratio of users to administrators, but I'm confident it's much greater than 1.
Admin-only capabilities are useless to the vast vast majority of your users.
Universal capability to create and use add-ins, would open the floodgates of user innovation.
Would you need to mitigate risk?
Any cost of doing so is trivial compared the increased value of Atlassian products.