I've been a schoolteacher all my working life, plus (obviously) a pupil myself and a university student, so have experienced both sides of 'education', and I see what you're thinking.
Much of what I was taught as a child (in the early fifties) could be labelled 'propaganda'. For example, the vastly superior British Empire, women's 'place' (domestic and cookery lessons, typing lessons only for girls etc), the glories of War.
Nowadays there are many 'woke'-type lessons being delivered to children at school. And religious tenets in various faith schools.
I think the only way to judge the curriculum is by applying the test: "Is this actually The Truth?" In other words, can a standpoint be justified as true, provable and backed-up by research, science and unbiased conclusions.
This is a tall order. Throughout life, not just in education, opinions expressed in the media and even on News programmes are often obviously biased. I cling to those two words: The Truth.