Earlier quoted context omitted.
Engineer here with an anecdotal story. My sibling has a doctorate in liberal arts (teaches at a university and publishes papers) and reads quite a bit and has said similar things on how this aids in critical thinking. They're great in some discussions, but all technology is essentially magic and math is complete gobblegook to this individual. This isn't to say they aren't smart and don't add value to society, but the…
Basic numerical literacy is important for everyone, but it is no exaggeration to say that moral, political and philosophical (and that includes the philosophy of science) development also separates us from far more primitive creatures over centuries. To me it makes equally as much sense to say that all that development is closed off to engineers (and I say this as someone finishing up an engineering degree myself).
As a counterpoint to the above, I believe most highschool students can read the publications of many professors in the liberal arts and understand what they're saying (Ex: literary criticism) although it helps to have some background knowledge of the period in question. How many highschool students or even liberal arts professors can read and comprehend practically anything that someone in the engineering department published? My point is that it takes a lot more effort to get a working knowledge of something like physics. Although not everyone can and should be able to read a quantum mechanics textbook, I think the average adult should know about things like entropy. If you don't agree with STEM, at least change the course requirements so that the technically inclined can get more math and science courses under their belt. Your country may already do that, but it isn't super common in the US (public or private schools). My parents forced me to go to Catholic school growing up (public schools were terrible in my area) and this resulted in mandatory 1-hour of daily religion class for 13 years that I could have used for something else I would've preferred (math, science, engineering, programming, philosophy). Regardless of one's views, I question the sheer breadth of the US system over depth.