Reminds me of the gentler, naive times when popular sci-fi taught us even the most impossibly superior alien invaders could be beaten by moisture or asking them about a really good logic paradox (if robotic) or by exposure the common flu (if martian). Or moisture again (if alien, in a very stupid movie).
As the market for orthodontists diminishes, people entering colleges or trade school will train for whatever skills the market demands. Older orthodontists will either retire or retrain themselves. This has been happening forever. It has nothing to do with the 1% owning more and more of the world’s wealth.
Nice. In their defense, the ol’ freeze-and-burn will kill most things when executed properly, including vampires, zombies, that pesky T-1000 guy and even Methodists.