https://en.wikipedia.org/wiki/Constitution_of_the_Democratic_Republic_of_the_Congo#:~:text=2%20Past%20Constitutions-,Current%20Constitution,Congo's%20sixth%20constitution%20since%201960.

Governments in Peru and DRC etc can change and so can their mining laws. The USA can change things but stability is a lot more guaranteed.

Stability is required to monetize 40 year ++ investments ie. to bank the long term cash flow.

Cheers
Notgnu