The assumption that hareidim don’t value secular education is wrong. The difference is that while seculars (and Jewish wannabees in particular) view secular education as a source of enlightenment and as a badge to prove their worth as a person. Hareidim value secular education only for what it can do to benefit them. For enlightment and self-worth, Torah is what matters. The goyim learn secular subjects “lishma”, frum Yidden do it for ulterior motives. That’s the difference.
If a hareidi (hareidis) wants to cook good meals, he/she will learn cooking. Not since that makes him/her a superior person, but because they have a use for that skill. BTW, have you noticed that there are many hareidi households with excellent food – and they didn’t learn that in a frum school. One find hareidim with all sorts of job skills (you really think all those hareidi businesses pickup the need skills in heder?).