My closest friend is from Mexico and speaks Spanish fluently, as does my grand nephew and his Dad. I recently acquired Babbel in an attempt to learn some Spanish, but I am not practicing nearly enough. My bi-lingual friends at work implore me to practice all of the time with them and others.
Its harder to learn Spanish at age 58.
Chance as a real force is a myth. It has no basis in reality and no place in scientific inquiry. For science and philosophy to continue to advance in knowledge, chance must be demythologized once and for all. –RC Sproul "A lie can travel half way around the world while the truth is putting on its shoes." –Mark Twain " ~"If that's not sufficient for you go soak your head."~Faith You can "get answers" by watching the ducks. That doesn't mean the answers are coming from them.~Ringo
Much, much harder as you get old. My wife is pretty seamlessly bilingual (Spanish/English) and yet I struggle to do much beyond ordering “dos cervesas, por favor” with my three years of high-school Spanish from a half century ago. I just can’t listen fast enough to keep up in a conversation. But yeah, we need more language early, not to be eliminating classes. I learned a huge amount of English from the lone year of Latin I got before the teacher retired....
Spanish has a lot of advantages - it's a major global so would be very useful. It's also a very common language in the US which means both that it's immediately useful in daily life and employment and students don't have to search hard for opportunities to practise outside the classroom - at least in some parts of the country Spanish-speakers are easy to come across and Spanish-language media is widely available. It's also one of the easiest languages to learn for a native English speaker.
The most important thing, though, is not to wait until high school to start teaching languages. Teach kids foreign languages as soon as they start school - 4 or 5 of whatever it is in the US. Start then and you'll end up with some people beginning bilingual as a result - start in high school and the effect is negligible.