In that case, you can enlighten us on what specific elements are needed and whether they are no deposits in the US and Canada or whether the deposits are not competitive with e.g. South African mines in the current geopolitical environment.
https://nap.nationalacademies.org/read/12034/chapter/1
That’s from a 15-second browse. Which anyone could have done if they WANTED to. But ignorance is bliss, they say.....