Hi, this is Mike from Atlassian Engineering. Strongly agree with this. I'd say that if you can afford it, don't do the hard deletes on a schedule though. You never know when there's a system out there referring to soft deleted data that fails once the data is hard deleted. Hard deletes should feel frightening because they are frightening.
i disagree for one reason. you really don't want the tooling or the process to rot. running it automatically normalizes the scary. otherwise you have bespoke tools in indeterminate states being run by people who are learning how to run them again. that's when i believe things get dangerous.
if it forces additional fail safes or backups to be able to do so safely, then that's probably a good thing to have anyway, no?