I also hear that argument often and I absolutely hate it. They always say "tech them things like insert manual labor work. Nobody needs Math."

It always depends. A lot of people will likely never use a saw outside of school. Especially in a time where a lot of people go to university the skills that complex math teaches you are basically the bare necessitys. Also school usually is teaches you the basic broad knowledge and skills required to get more specific education on a specific topic. This includes studying all different subjects and also getting training as a woodworker. It is literally impossible to focus on everything and that also isn't really the use of school. Its just the first and universal form of education.