I believe you are interpreting “business need” as “commercial need” when I think it’s more like “what is your business here?” Purely anecdotal, but when I visited Moffett Federal Airfield to visit the aviation history museum there I asked the security guard at the gate checking my ID if I could ride my bike around the base afterwards. He said I needed a business purpose to being on the base and that visiting the museum was a business purpose but biking around aimlessly wasn’t.