IIRC, there was a dev comment that to interact with thargoids you would have to choose to do so, something like that. Whether this means they will be moving through an area of space which you can avoid by simply staying out of the region, or whether they will only appear in certain signal sources that you will have to drop into, or whatever, it means those who want a Thargoid free game will probably be able to have it.
While you might not like that OP, there will be those who appreciate it, and there is nothing stopping you having all the Thargoid experience you want without worrying about how much thargoid experience others are getting.
To be honest (and I'm posting this just as an explanation of my mindset, not as a challenge or looking for an argument) the very fact of opt-in means that I'm already not having the Thargoid experience I
want and it has nothing to do with being concerned about how much anybody else is getting.
To clarify, the experience as it stands today is essentially a trip to a theme park. It's Thargoid Towers, which I'll admit does sound like possibly the best concept for Planet Coaster DLC that you're ever likely to hear but doesn't actually reflect what I'd hoped for from our ammonia-loving friends return to the Elite Dangerous galaxy.
There is no threat. There is no peril. They have no effect whatsoever on me, my ships, or my gameplay. Nothing has changed. In fact despite me having been in and out of Maia, Col 70 and the surrounding area numerous times since they first reappeared (including shipping holds full of meta alloys which are harvested from their bloody barnacles) I still haven't even been interdicted by one.
My own hopes for the return was that it would bring gameplay to which I had to react, rather than choose to make a special trip to participate in. I'm increasingly sensing that what we're actually going to get is some kind of Universal Studios
The Thargoid Invasion Experience TM and whilst I'm sure it will look beautiful, sound incredible and prompt a torrent of screenshots of Asps in front of it like nothing we have ever seen before, the chances of me logging in one day and discovering that my home system is being completely evacuated, or jumping to Founders to discover that Jameson has been cut in half and the engine section has fallen out of orbit causing an environmental catastrophe on the surface would seem to be pretty much nil.
Now maybe I'm wrong and FDev are going to surprise me but honestly I just can't see it. It's their call obviously, they make the game and I'll accept there's no doubt that there would be an outpouring of rage and misery on the forums were some players to lose so much as a limpet as a result of non-consensual hard Thargoid action but I think it's to the detriment of the game overall.