It's still oil. At worst they can just not touch it at all or keep it on life support like coal is being treated in Poland due to miners' demands, it's a strain (and quite fucking unfair towards people who aren't miners at comfy labor union and politics infested governmental mines) but doesn't ruin the entire country on its own.

There are also plenty oil less countries that do well, what Venezuela is doing is just pure WTF, even considering their placement.

At the same time Maduro doesn't seem to give a shit and just presses on with his absolute devoted voter base, pure PR and attempts to meddle with the constitution.