Sometimes I have to accept there is a disconnect between what I think is "okay" and what a medical professional would think is "okay." BUT I also don't like it when it feels like inpatient is being used as a threat.
Maybe you could make an agreement to have your health assessed by a medical doctor, and if the MD says you're okay, then inpatient's off the table for now, and agree to have your health assessed again in a few weeks/months?
I also think it would be a good idea to clarify what specific things T thinks you need inpatient for. Maybe T is noticing things that you are not aware of? Or maybe you have made progress in some areas, and T is unaware?
I think you should try to have an open mind in considering it is possible that inpatient is needed when T suggests it. However, you have a right to know exactly what for, and in what ways you could expect it to benefit you.
Thank you for sharing with us!