I was talking about literal strings. (When people say they aren't monkeys or machines, they are also thinking about literal monkeys and machines with metal cogs.)

Some constraints are felt as restricting, for example literal strings attached to your limbs and other constraints, like scratching your head, because it's itching or listening to music you like, don't feel restricting. They are both 100% determined, but they make a pragmatic difference in life. (That was phrased weirdly...)

Your home can never be 100% clean, but it still makes sense to say that a home is clean. "Clean" means that you can stop cleaning.

Maybe you could say that "free will" in a juristic sense is defined by it's consequences. Whenever it makes sense to punish someone, you say they acted on "free will". Whenever a condition should be medically treated, you call it a "sickness".

Then you can't say that someone should be punished because they acted on free will, or that a condition should be treated because it is a sickness, because that would be circular reasoning.

I absolutely agree that you could very well define "free" as "not determined" and as it is determined, it's not free. There is just an alternative definition of free will, that makes sense.