Maybe you're an autodidact like many other engineers, and maybe you would have done better without schooling. Such people are a minority.
Like many, I think you're confusing "the school system is flawed" (it is) with "school bad."
If the schools in a given country were pumping out geniuses year after year then maybe you would have a point.
Poor community? Sorry Timmy, your schools SUCK.
Rural community? Get to farming Timmy. You dont deserve a GOOD education either.
Living in a rich suburb of a big city? Congrats, your schools are well funded and low student:teacher count. Your education will actually be pretty damned good.
The unintended consequence of this is all the junk mail that makes regular mail a horrible experience to interact with.
Raise the prices , remove the spam.
I personally get a massive benefit from USPS being cheap, despite the fact that I send no mail. It provides a massive low-cost physical delivery network across the country, with service to every address. This is a benefit to me because it makes business and personal communication simple and reliable. If I need it personally, it's there. If I don't, I still rely on thousands of parties who do.
Your position is like claiming the interstate system is useless because you don't have a car, ignoring how all those goods your life relies on actually get to you.