It sucks when Ts change things, I'm sorry!
My T had me start asking her when I needed a call back, instead of her calling back sorta by default for a while (wasn't always like this - I asked for a long time before then).
Anyhow... I think it's so we learn to identify our needs and seek to successfully get them met. For example, you may be feeling like you need a hug in another situation and need to skills to ask for it - or anything really (a held hand, a warm cup of water, for someone to leave you alone, etc) from other people. T is a safe place for us to practice. I'm sure your T would love to offer and give you hugs but using it to help you develop a skill is okay too.
Nobody can know what you need - they can guess and there are of course generally accepted social patterns (like a hug to sooth someone) but it's not a rule. Sometimes people don't want to be touched... And it can come all of a sudden. Being able to say no (or not ask on purpose) are good skills.
My Ts offer and I ask for touch. I do say no. I do touch work (all session doing somatic touch work) and during that I need to interrupt to just not be touched. It's powerful to know yourself and your body. Even if you will always want one, it's okay to learn to ask!! One day you'll find someone you want a hug from who won't know to offer.
When my T went back to me asking her to return my calls... I figured she hated me and didn't want me to call her and that I was so needy.
I understand... And she had to go through the I need to learn how to ask for what I want/need and using that is helping me get through shame and learn. She actually asked for this change after a conference... that reminded her of a way I could benefit to announcing my needs in my own voice rather than giving someone permission to think of what I need.