I've seen reports that poor people stuck in Venezuela have used Bitcoin to take payments for remote work and then to send payments overseas for expenses such as the purchase of a computer (necessary to keep working) that would have been impossible through government-sanctioned means because the government of Venezuela felt it necessary to prevent "hard currency" from leaving the country, which effectively made it impossible for Venezuelans without personal connections to those in power to buy things like computers at all (since Venezuela of course does not have domestic production of computers). Argentina would be another example of another government that had similar controls to prevent hard currency from leaving the country (probably no longer in place, but probably were in place for decades).

I'm not pro-cryptocurrencies, but assessing their impact is not as simple as you and others here imply.