The larger question is of course WHY is Cpanel doing this?

I cant imagine its "well updates take resources".

I CAN imagine them responding to host firms requesting it due to updates breaking sites and owners calling host firms to go "Help me!" and the host firms trying deal/keep customers.

Either way, should not be there or at the very least a toggle, allow update or not.

OR? Is this strictly for WP installs directly from Plesk? Not uploaded by Webmasters?