Back home, have some time, so here is some context for the quote:

She says that people often say "the data centre is here!" in discussions about sovereignty, suggesting that the fact that the DC is on "my" territory gives me control over it.
But, she says, you cannot know what happens inside, and so it is much more like having a foreign military base in your country.
In the end, the placement doesn't give you any control at all, and so the argument is invalid.