That’s a bit of a daft article. There’s about 400,000 tonnes of class 1 nickel currently used to make satainless steel that could easily be substituted for NPI. The process of converting class 1 to nickel sulphate is relatively simple and inexpensive.
The article suggess that most nickel sulphide is found in hostile or politically challenging locations, ie. northern Canada and Russia yet these two locations have been producing the majority of the world’s nickel sulphide for decades without any trouble.
Badly written, poorly researched and rather pointless articles IMO.