I’d put the number at much higher than 25%. And not just “tech” knowhow, but knowhow about any subject, whether that is archaeology, law, clothing production, j

I’d put the number at much higher than 25%. And not just “tech” knowhow, but knowhow about any subject, whether that is archaeology, law, clothing production, journalism, astrophysics, or web programming. Schools are in general pretty bad at teaching people that everyone is pretty smart, brains are incredibly plastic, and you personally can learn any topic and take up any field you put your mind to, and make a positive contribution, just by trying. For some fields getting to the cutting edge might take 10 years of intense study, and having a meaningful career might take credentials, but usually it’s possible to make some contribution much earlier than that. I have some friends who are willing to let themselves be curious about a topic, and just dive in and start trying stuff, and they usually can get incredibly far in a short amount of time (months), and come up with new ideas that have not been tried before, often surprising and impressing the “experts”. And other friends who are outright terrified of anything that seems confusing to a layman at first glance, and never try anything they aren’t already good at. For the most part schools rarely pushed the latter group to break out of their cocoons, and often explicitly held the former group back.