such as people looking to hide their finances from the oppressive regimes they live under and those who just want to make legal transactions anonymously.
Like making campaign contributions which would be legally required to be declared, avoiding legally legitimate child support and divorce payments, moving money away from creditors before your company goes bust, moving money around so the tax dept can't easily follow it....
Yeah there are lots of uses for things that are "legal" quite apart from trading drugs and ransoms.
Nothing that's not at a bare minimum utterly dishonest.