I'd go the other direction. I think if you taught every single 16 year old a basic class in surface-level understanding of time dilation/length contraction, gravity as a facet of spacetime, the two slit experiment, the twin paradox, relativistic star ships, so forth and so on - you'd see the number of astronomers/physicists skyrocket. They likely would not be able to follow the math and reasons behind, but that's not necessarily the point. Just understanding how absurd our universe really is, is something that I think is really kind of encouraging. It gives perspective as to the wonder and discoveries that await outside of the everyday bickering that people are exposed to 24/7 since the internet became ubiquitous.

Even less exciting things like seeing how the doppler effect led almost directly to the concept of the big bang is something that seems critical. That it's not (or, hopefully was not) a normal part of curricula seems odd. Even things like the mind boggling implications of the various conservation laws are just incredible. That topic is at least covered in lower education, but rarely if ever in such a way as to really elucidate how incredible these rules are, and all that can be derived from them.