Determinism is freedom....really?

One thing I struggle with when people say "determinism is freedom" is that the same logic seems to apply equally to its opposite.

Ie if someone says.....

"You're free because you can reflect on the causes of your behaviour, reason about them, and improve your life."

I could just as easily say.....

"You're free because you reason poorly, dwell on negative thoughts, reject good advice, and never change."

Under determinism, both trajectories are equally determined.

The person who becomes optimistic and the person who remains pessimistic aren't exercising different amounts of determinism. They're both following the only path available from their respective prior states.

So what is the word "freedom" actually picking out here??

It seems like what's really being described is that some deterministic systems respond to reasons in ways that lead to desirable outcomes, while others don't. But both responses are equally inevitable if determinism is true. That's why I struggle to understand the slogan "determinism is freedom." It feels like it's attaching the word "freedom" to one subset of determined outcomes rather than identifying a distinctive kind of control.

It feels to me like a celebration of the consequences of having been determined to become the kind of person whose causal trajectory is going well....