Android and iOS have almost equal market share in Norway. Worldwide Android is a lot bigger (~70%). This affects most people, just not in the US.
It doesn't change the fact that tracking your detailed location and who you are around in combination can be used to determine your affiliations or sexual orientation. If you, with your secure iPhone, are located around numerous people with Grindr installed, they may jump to conclusions.
They are capable of targeting gays or political opponents with this, which is the point of the story.
I heard of a software called Pegasus but couldn't tell if it was legitimately that powerful.