I learned calculus for the same number of years that I learned Spanish in school.
So by that analogy, most Americans have studied a second language.
The problem is that you need other people to interact with who speak the language.
So, if you don’t naturally have friends or family who speak that language it’s is not really practical to learn as you can immerse yourself in it.
There is also no point in doing it, if you don’t have a way to use it.
Why not learn something else that can actually be used?
Again, this is coming from someone who is currently learning a third language.
Learning a language takes years and a lot of work and practice. Asking someone to learn a language is asking a lot of them.
Most Americans do not encounter a foreign language day to day.
Sure there are instances here and there, but they are not significant enough to learn an entire language.
Would you learn to speak Chinese because you couldn’t help someone with directions in China town or your food order was incorrect because of a language barrier?