With the same kind reasoning you could argue that the DPRK is the freeest country in the world, for "their flavor of freedom".
Let's avoid the faux intellectualism of "if [cherrypicked example], is the whole invalid?" Freedom isn't a black-or-white matter, you can simultaneously be prohibited from killing and free to speak your mind while jaywalking on a quiet street. But IMHO, one ought to consider topics like maslow's hierarchy of needs and human rights conventions before bringing things like music piracy into the topic of freedom.
The US' top federal marginal rate of 37% is pretty low.
In countries with more expansivo safety nets, it looks like it's up around 50%.
For example, it might mean someone has to work a year longer before accumulating wealth and retiring. The benefit far outweighs the cost, but the cost is still there.
Taxes are inherently a restriction on what one can do with their money. That said, without them we wouldn’t have roads, police, healthcare, social security, etc…which does add freedom to many peoples lives. I think another comment said it best, laws can increase overall freedom in a society, but they do still restrict individuals.
But that doesn't change the fact that we're talking about the government taking an asset (the 13%) from an individual.
It's hard to bill that as a zero-impact action with regards to freedom.
One might say "I think net freedom is increased by redistributing money from the extraordinarily wealthy to the broader population." But it seems illogical to say "We can create more freedom by taxing the wealthy, because that creates more freedom for everyone not wealthy, and has no impact on the wealthy."
I'm hard pressed to come up with a justified "No" to answer that question.
Let's hear some specifics. Name one specific thing someone at this level of income might do that extra income that meaningfully impacts their life. Your inability or refusal to do so so far seems to support my point here.
Here's my concrete example: if we added +13% to Jeff Bezos's accounts, do you really think that would change his life even a tiny bit? Would it change meaningfully even if we subtracted 13%? I'm just gonna say that's a no either way.
Which one can feel on way or the other about, but it's disingenuous to claim that's nothing. It's not nothing.
So make the full claim you want ("I support laws that tax the rich and decrease their freedom, so that poorer people can have a stronger social safety net and more freedom."), being honest about all sides, instead of the edited version ("I support laws that increase freedom for everyone {because money doesn't have value to rich people}.").
And recognize that if it's moral umbrage you're taking, the same reasoning extends down the income scale. (Making the assumption that you're not making minimum wage, and I'm not) Presumably someone who is making minimum wage would believe many of the things we do with our additional income, but would not do without it, are "not meaningful."
Besides, the point wasn't about platonic freedom, but instead about a specific flavor of "freedom" that exists in US culture. In the dinosaur park analogy, the electric fences can be likened to government safety net programs. As you may be familiar with, there is a political faction in the US that dislikes the idea of being "forced" to pay taxes to fund programs to help the less fortunate, and a lot of the issues related to various forms of crushing debt stem from that ideology that a rich person should be "free" to be selfish.