Multiple reasons.
It acts as a great filter. I have no interest in working for those who aren't pro freedom. I do not want just anyone to wear and use what I make. It is meant for sovereign individuals. Not the average state whoreshipper.
Taxes. No evil will steal from me and use the value I create to fund war across the globe or on their own people.
I respect my clients and seek the highest quality of materials to offer them only what's best. I expect the same respect in return and this means getting paid with the highest form of money. Getting paid in dollars is the disrespectful equivalent of getting paid in pennies. I respect myself and what I do a lot more than that.
There is no legacy to be built in the old and crumbling economy.