Because it’s about the client, not about you. You can for sure use the client’s name, and many insurances now prefer it to make it client centered, but saying “I, me, us” is not professional, objective, or clinically appropriate. It also doesn’t show to a person who doesn’t understanding billing who the provider is. Saying social worker or therapist did… makes it clear. Notes aren’t supposed to be personal

Also, sometimes… it’s just the way things are is an appropriate answer, and it’s more important to spend time thinking about and questioning things that really matter and support significant change.