That is the story according to GalNet, which is an in-universe source and subject to it's own influences. There are numerous discrepancies between the Guardian's description of the Thargoids, and the Thargoids that we see a million years later. And while GalNet is in-universe, it's not all-powerful and Frontier do still have to write in hints, some of which aren't particularly subtle if you know what you're looking for. Like how the
original station attacks article has an
incredibly small death toll, as well as a description of how this warlike alien race deliberately held back, to disable the station rather than tear it to shreds. Or, since we're on the Guardians,
here's the response to the Guardian logs. Including:
Weird detail for the writers to add, isn't it? Even weirder to go further out of your way to highlight the fact that it hasn't happened, and still hasn't. Hinting that these Thargoids are somehow different...
And if we want to cheat, several official Elite Dangerous novels just straight up have successful Thargoid communications and cooperation with humanity. And have two clans of Thargoids, one warlike, one more peaceful, which neatly explains the Guardian logs. But of course, it's secret. So it's hardly going to be headline news on GalNet, the closest we'll get for the time being is hints like above that maybe something isn't adding up here.