So what's the payoff if current T would say "I care about you?" I don't see the life changing magic of that, except perhaps it would somehow prove that he's not just another person who will give you less than what you want. Until the next time.

Perhaps it's not a useful inquiry, but I'd encourage reflecting on whether this is really about him saying a very precise phrase because you want him to and because it holds some specific meaning for you. Or whether there is a broader issue, such as in your current life there is an important person or two who give you less than what you want, or some other relationship issue.

Your thinking seems reactive to me and it feels similar to the process of how you left MC, and at least in my experience reactivity driving my decisions doesn't make for the best outcome. I have no investment in whether you stay or leave or quit therapy or whatever choice is best for you, but I think how one does it and what you can learn from it can move you forward or not.