I think enough experienced Exchange Administrators have voiced that these commands have solved things in the past. And that at least some of the first levels of MS support are not even aware these commands no longer work.
I also think the idea of "rewriting" the mailbox in-place should be considered as an alternative. Historically I have found that moving a mailbox eliminated items that were corrupt and causing issues that were not easy to identify.
Put on the scale 8 hours of admin work with or without MS support trying to troubleshoot an issue and MAYBE fix it, vs copying the mailbox and leaving the corruption behind. The items are corrupt already. If there is an acceptable level of item loss agreed to, the ability to rewrite the mailbox in-place would likely satisfy most of the grievances admins are having with the deprecation of these commands.