Ah, right, I thought you meant the assimilation we actually saw where the Queen's ship was but part of a customary armada.
I wonder if there was any truth to what the Queen was describing to Seven... The Queen's main interest appeared to be Seven, after all, not Earth.
Personally, I see the Queen as a spoiled brat. She's never done anything to dispell that notion. So when she said that she allowed Seven to leave the Collective in the first place, I see her as speaking out of her ass. She saw the whole thing as a way to jerk with Voyager and possibly get revenge on Seven for leaving.
But I do think that the Queen had an interest in Earth. What we've seen supports that.