To make sure they support it, and to make sure they keep supporting it. Compliance today does not buy you a free pass tomorrow.
Regimes come and go; metadata is forever.
Look at Xi Jinping's regime. Lots of party officials, members of the politburo, etc. who while they support the party itself may not support Mr. Xi, or vice versa.
Even strong (executive power) leaders like Mr Xi or Mr Putin do not rule over a monolith.