My partner had to get some imaging done and I wasn...

My partner had to get some imaging done and I wasn't allowed to go in with him for moral support because he has high anxiety when it comes to his health. I understand if you want to enforce that rule but the problem is, I watched a father and son walk out of the hospital as I was entering so how is it that patients can't have any guests or visitors with them If I just watched a father and son go in together. What's the difference between the father and son being family and myself and my partner being family. Even when we were first walked in, the woman at the front entrance, which I assume is a nurse, paused for a long while before asking which one of us was the patient. So it seemed to me that she could have said yes or no and she chose no based on her own view on what stands for family.
When I asked for a second time I was given a stern "absolutely not"
While waiting for him right now in the car I just witnessed a mother and daughter go inside together and not come back out.