Seems perfectly sensible to ban all software that is not pre-approved by IT, InfoSec and Legal.
You can't safely assume all your employees are properly assessing the risks unless that is their actual job. If you only allow what you know then you can reason about your risk.
I'll be absolutely stunned if people are really having to raise JIRA tickets instead of typing "brew install" but my information is secondhand so what do I know.
Our laptops are configuration managed, force upgraded, and surveilled, but we all have root and IT has never stood in the way of "power user" behavior. The extent of the frustration in engineering is that their management processes sometimes eat CPU. My understanding is that most of the Valley is like this.
https://github.com/google/santa is used to whitelist binaries on Macs, but you can fill out a form to instantly opt out. One of the options for why is "I use a package manager".
You can't safely assume all your employees are properly assessing the risks unless that is their actual job. If you only allow what you know then you can reason about your risk.