They'll use it when they take a deeper look into something because their curiosity that we fostered was piqued and they discover something new and interesting about our world, adding it to our collective knowledge.

People advocating for teaching of personal finance and taxes in schools were always the ones not paying attention.

I know this because I’ve seen them say that, I’ve also seen them not pay attention when the topic was addressed when they were in high school. Many of these topics are mandatory in Scottish High schools and have been for most millennials and younger.

Anyone that can comprehend the most basic algebra and statistics a secondary education would give you can understand taxes and finance from free accessible websites/library books. Best practices for personal finance and tax laws may change, so your likely to have to learn some of it again. It’s vital schools provide the more abstract but timeless skills of maths, reasoning, reading and comprehension.