Schools shouldn’t be treated as these magical places where you’re put in at some age and over a decade later you emerge a complete human being. You have parents and you spend more time at home than at school for a reason: you’re supposed to learn from your parents.
A school can potentially give you a degree of financial literacy instruction. Your parents should be the ones paying your allowance money and driving you to the bank to get your first checking account. A school can teach you how to cook something. Your parents should be the ones eating your food and helping you cook it better. A school can show you some level of DIY. Your parents should directly benefit from teaching you how to fix the sink when it gets clogged. A school can tell you what kinds of careers exist. Your parents should love you enough to tell you that either your career ambitions or your financial expectations need to change. A school can tell you how to build a resume. Your parents should be the ones driving you to your job interview and to your job until you buy your first car. A school can give you a failing grade when you do poorly on a test. Your parents should be able to make you face the real, in-the-moment consequences of doing something wrong.
Expecting a school, public or private, to teach you everything you need to know is a grave mistake. You need people in your corner who are taking an active part in raising you all the way to adulthood and beyond. If you have kids yourself, that goes for them as well. If you aren’t there for your children, to teach them the things that schools don’t teach because they can’t mass produce the lessons to nearly the same quality that you can give them, they’ll blame you and the school for having failed them. And they’d be right to lay the blame at your feet.
I sort of agree in that parents should teach in addition to schools. However, this feels like entitlement showing because it makes a bunch of assumptions about parents (that others have already commented on), but just even having parents. There are a lot of people who only have one parent, or no parents for various reasons. What about kids who lost one of their parents to cancer and their remaining parent doesn’t have the capacity to teach the subjects you mentioned? Schools provide an opportunity for common education for everyone.
If one parent dies, that’s tragic. The surviving parent should seek support from friends and family to raise the child. If both parents die, that’s even worse, and the kids should be placed either with their remaining family or with one willing to adopt them. That’s an entirely separate apparatus.