the entire field of K-12 education also is based on a bunch of "non sense" historical stuff, like tests; which came from industrial revolution times where owners wanted to check who would be less likely to break their expensive machines by comparing who remembered more operation steps... which by now pedagogic science knows it's a great way to retain information but as it's done in most school environments is a completely absurd. go try to suggest a change on the system or even implement something effective, cheap and well known as retrieval practice on the school schedule
transfer of learning is a scientific fact but what are the applications of a bunch of stuff we need to learn as teens? Linus Pauling's thesis that won a Nobel? again, transfer of learning isn't a magic bullet that its effects spans across everything you do in your life, nor it's an easy concept to explain to children and get them convinced that learning stuff that you'll forget in some months or years is actually good!
then we have the amount of stuff parsed to children. take a look at data showing the amount of subjects of science taught on North Americans schools and Japanese; now take a look which culture has a better understanding of science!
etc.
schools needs to grow on other areas than parsing knowledge of the natural world, like emotional resilience, collaboration skills, how to deal with grief, not increasing score metrics that also has a problem on its own, like letting behind some districts (thus making it worse) that don't have resources to keep with advancement; and to make a counterpoint with the website OP, i strongly believe and trust professionals teaching children these skills than a bunch of unprepared parents that i have my doubts even half of them actually spend any time reading evidence based tips on how to grow children, let alone meta-thinking about their relationship with them