Consider a Venezuela scenario. Inflating currency and limits on currency conversion and transfer to prevent money escaping the border. With crypto your money is already across the border.
That means the only way to get some is by exchanging. You can either:
(1) Exchange with someone else in the country someone who already has bitcoins (let's say they mined them). In Venezuela, there remains the exact same number of both Bolivars and Bitcoin, so it's zero-sum. Neither Venezuela nor Venezuelans are better off by this exchange because nothing's changed.
(2) Exchange with someone outside the country. Problem 1: Who on Earth will take your worthless Bolivars? Problem 2: If you do manage to find someone who will take your worthless Bolivars, why wouldn't you take US dollars instead (since you can trade freely, you may as well just open a USD bank account somewhere). Or some other asset that hasn't lost 80% of its value in the last year? Gold? Equities? Gold equities? The list is truly endless. If you find someone to take your worthless Bolivar bags for real assets there are much, much better assets.
The fiat-value behind Bitcoin doesn't just spark into existence, willed by the devout masses. It's not like Venezuelans can suddenly mine Bitcoin in a way nobody else can because of their bad government. They also definitely don't all have Bitcoin in a way they can just ignore the balance of their bank accounts.
How do you solve the initial distribution problem in a way that makes sense?
[1] https://www.newsbtc.com/2018/05/31/officials-in-venezuela-be...
[2] https://bitcoinist.com/venezuela-now-requires-bitcoin-miners...
Admittedly, I don't know what could be done with crypto to help the average Venezuelan at this point.