Dictating specific tools without a very strong technical justification is a strong signal that your management doesn’t trust you to make any important decisions.
Why would it be "unprofessional"? It's an editor. I've used it in every job since I left college 20+ years ago.
What? Why? Who the hell would ever forbid anyone from using a tool that literally makes them more productive? I mean, as the Russians say: "If drinking vodka at work interferes with your job, quit drinking vodka... at that job"