I don't mean to be flippant. But I recently had to convert Phillips proprietary DS2 audio format file to MP3, and purchased Phillips software to do that. And then financials came down hard because it wasn't on the approved software list.
But I do know what a pain some IT shops can be.
I know it's a favorite program of a lot of people but personally I just think that's testament to how bad the situation is on windows.
I've not seen this in practice. Sure, it has a clunky gui, but outside of that 7-zip has excellent windows 10 or less integration and works fine in windows 11 even though the jerkwad potentates at M$ decided to hide the usual explorer options behind a second panel.
If you work IT support in any capacity, you should accept that your job is to solve problems for people who are doing things you either can't do or don't want to do.
Their experience is outside of your wheelhouse, and you are there to make the technology transparent to their job function. If you can't do your job with a glad heart then find a different one.
Have some humility.