most people will never need Latin in the sense that they are unlikely to read original works written in Latin unless they become a classics professor. you could

most people will never need Latin in the sense that they are unlikely to read original works written in Latin unless they become a classics professor. you could say the same thing about most classes in elementary through high school. rarely if ever do I directly apply my knowledge from biology, history, english lit, etc. once we start looking at indirect applications, I think Latin and Greek are easily as useful as any other subject. even if you can't read them fluently, having a firm grasp of grammar and vocab in these languages is a huge advantage when it comes to proficiency in English. complex terminology in other fields becomes much easier to understand when you know the roots.