I think from the perspective of the IT department it makes sense to unify programs that people use. As I cannot really tell what your company does it’s hard to argue for it but if the company does something website related in IT you could argue that it’s important to test on all browsers to ensure that it works for all users. Aldo you could try to find information about data collection and how quickly security issues are fixed by each browser manufacturer.
Personally I found Fedora a great compromise in between. I never really had any issues with it and it is fairly up to date in terms of packages.