The specific case I read about was someone escaping the Russian occupied areas of Ukraine this way: https://www.forbes.com/sites/tatianakoffman/2020/06/13/why-b...
It’s also more common in countries with bad currencies and limited access to USD (Venezuela).
You’re right it’s not perfect, but it gives more power to individuals than the alternatives. It’s also possible something like Zcash could allow individuals to transact despite an all seeing panopticon, but I don’t know how that works well enough to have a strong opinion.
