Science education at the primary level has long emphasized the products of science, with little regard for the process. Science teachers are a product of this system as much as everyone else. Most of them just aren't equipped to draw a distinction between science and pseudoscience.
Mumbling something about falsifiability isn't going to fly without motivating it and showing evidence, whether or not they have internalized those concepts themselves. Holding them to higher standards won't help, as there aren't enough qualified individuals to go around, unless some sort of mass teaching approach becomes the norm, and it's hard to see that working well with kids.
This is not an educational problem. It's a cultural problem, and it needs a broader approch.