As somebody who worked in IT before and who had to wrestle a bit with policy in the past - I recommend you don't see your work MacBook as your "own computer". Because it's not. The company shouldn't restrict you from doing your job and reasonable and competent IT departments know which users needs what access (including root access) to perform their role, but they do also have a duty to the company and its equipment and frankly have the right and resoanable need to install admin tooling.

Try and see it from their perspective.