Fishing

Give a man a fish, feed him for a day. Teach a man to fish, feed him for life... or so the saying goes.

What if he already knows how to fish?
What if he can't afford the line or hook (rods are out of the question)?
What if there's nowhere to buy line and hooks?
What if there are no fish due to overfishing?
What if the fish are endangered?
What if the river is polluted and the fish are poisonous?
What if he gets attacked by mossquitoes and gets malaria while waiting for fish?
What if he goes to the next step and starts dynamiting the river for fish?
What if the fish don't taste good?
What if his wife doesn't know how to cook/clean fish?
What if he fishes, to the exclusion of farming, and thus has nothing to eat?

what if, what if, what if...