You guys really need to pay more attention to the story here, and what the Devs have said on the subject.
FD have said that initially (at first, in the first instance, at the start, in the beginning), the Thargoid content will be limited to a certain area that we will have to choose to travel to in order to experience.
This tracks with the narrative that FD are making with regards to the Thargoids - They are coming from somewhere (Col 70) and going to somewhere, and their route takes them right through the Bubble.
That means that at the beginning they'll be emerging and staying further out from inhabited space before periodically moving closer. To be where they are (because they won't be everywhere at once), we have to choose to go where they are. Likewise it means we can choose to stay out of the way.
As they move closer, more and more players will be affected, and more of the Bubble will be affected, and it will be incremental. It will get harder to stay out of their way. Thankfully we know from the story that they're not directly hostile to us, they're just leading their enemies through us to use us as collateral damage. This means that even while they are blasting a path through the Bubble fighting each other, we'll still have the choice to enter the crossfire or stay out of it.
We'll have the choice to fight them or to deal with them in other ways and on other terms. Precisely because the fleeing faction understands that humans aren't a hive mind and so don't count individual actions against the entire species.
So the answer is yes and no. They'll be content forced on the playerbase and we can choose to stay out of the way or choose to fight.
Bottom line is, we're not their targets, and they're not really interested in us per se, we're nonetheless on the defensive because the pursuing faction seem to favour a "fire everything and accuracy be damned" kind of tactic.