Yeah, it is apparently fashionable in certain circles to just pick some random theory and bash it till kingdom come, along with everyone supporting them. High school never ends, I guess.
Indeed. I find it discomforting and at the same time ironic that in less-informed circles science bashing is becoming bon ton. I say "ironic" because if doubting consensus amongst specialists is already an act of profound arrogance, increasing the stakes by accusing these specialists of arrogance becomes a laughable proposition.
Back to OP's question: yes, any child should get exposure to astronomy and more in particular to modern cosmology, and such a course should be mandatory. We all need to know our place in the universe. One might discuss details such as when best during a child's education to introduce astronomical and cosmological insights, what should be the exact contents, and whether such a class should be introduced as part of a physics course or as a separate course, but I can't even imagine a single valid objection against the general idea.