What sort of subtle things are you actually talking about?

Hand-holding/hugs? Some people are not comfortable with physical contact, and others want it. If a client wants to have contact with a T, that is entirely up to the T whether or not they oblige. The T might not be comfortable with physical contact, and even though it might help the client... they T doesn't have to bend themselves that far. Of course, it would be nice if they would explain that to the client, and it's a-ok for the client to want it. But the T is a person, and they shouldn't have to be super uncomfortable at work.

Presents? Well, personally, I hate being given gifts. But I accept them from my students and say thank you. A lot of the presents they give me? Well.... they're usually things I don't use and so I give them away. But if they've drawn me a picture? I stick it on the wall and it stays there until the end of June. So unless a T has been told or views being given a present as something that's like a bribe or inappropriate... it's pretty easy to bend on this one. Again - hopefully they'll explain if it's a policy or not to the client.

Out of session contact? Some Ts may be ok with texts or emails, others aren't. The client unfortunately needs to accept that, as it's the Ts personal time and they really might not be comfortable having someone text them when they're out with their friends. It puts them in an uncomfortable situation - should they reply to this client even if they aren't quite sober at the time? what will happen if they ignore it?... and then they end up as hostages basically. They need to make this boundary clear to the client.

Saying "I care about you" to a client? I can see how a T would be flexible with this depending on the client. I don't think it would mean that the T cares more or less about different patients (although really, they're human, so they probably do!) but this is the T's judgement on what would or wouldn't be helpful to a client. Like.. if my T said that to me? I'd probably withdraw from him because it would scare me. But other people might be at the point where they would accept that from him and find it comforting. Others might crave it because they're trying to get the T to fill a void that the T can't fill.

Were you talking about things like those? I do still think that the T needs to make those boundaries clear to a client, so that the client doesn't end up feeling rejected or hurt when they find out tha the T isn't going to do things their way.