There's a component of modern culture that trains and expects people to be extremely pessimistic about long term human development. It results in situations above, where without any further information people just assume by default that were going to run out of a thing and are on some collision course with not just a disaster, but every single conceivable one.
(Gallium is a byproduct of aluminum production. We aren't going to run out.)
(Gallium is a byproduct of aluminum production. We aren't going to run out.)