I wonder about this too because it seems to have to do with long term planning. Which on one hand seems to be one of the greatest feats humans have accomplished and sets us apart from other animals (we don't just plan for hibernation) but at the same time we're really bad at it and kinda always have been. I think there is an element of the "Marshmallow experiment" here. Rewards now or more rewards in the future. People do act like there's an obvious answer but there's also the old saying "one in the hand is worth two in the bush." But I do think we're currently off balance and hyper focused on one in the hand. Frankly, I don't think the saying is as meaningful if we're talking about berries instead of birds lol.
That aversion is really fascinating to dig into, I wonder how much of it is cultural vs something innate to people.