That sounds like something you should back up with unambiguous evidence.
Also, I reject your use of "unambiguous". Ambiguity is a given, we're not discussing a mathematical proof here.
Edit: sibling post found it, apparently its results couldn't be replicated :/
Most Soldiers who were using 'addictive' drugs simply gave them up when returning home.
A small but constant percentage didn't ~3-5% - Alexander postulated that these types will become addicted to something and it was genotype & circumstance that led to addictive behaviours not the drugs themselves being chemically addictive.
Bruce Alexander has stated that this evidence led him to try to confirm it with his Rat Park experiment.
He plainly showed it was the inhuman conditions that led rats to kill themselves with drugs, well performed, proper controls.
Flew in the face of the prevailing orthodoxy and the political capital of the drug war boogeyman - so no funding for replication. Career suicide to replicate it back then.
It is pretty obviously true, there is hardly a human activity without an associated -oholicism.
And your conclusion is that the result of this will be that people will get addicted on drugs rather than seeking relationships with other people. But you just said that most people will have relationships with instances of AI instead. So people will not get addicted on drugs, they will just have amazingly happy relationships with uber social AI instances.
On the other hand people who lack things that give them the natural dopamine trigger tend to get highly addicted to chemicals that trigger the dopamine release artificially.
I'll admit I'm a highly pessimistic person but from what I see we are trending more and more towards automation and AI that will remove the need and even the possibility of having many of those natural dopamine triggers.
Imagine a world where its impossible to invent or create anything new because an AI more capable than you has already created it, and what's more the frontier of what the AI is capable of is expanding faster than your mind can physically catch up with so you will never be able to match it, ever.
And in this world when it comes to work or art there is always an AI/robot that can do it astronomically better than you can. Maybe you still get a feeling of reward from relationships with other people, but more likely the AI is better at relationships than you are, and most people in the world only have relationships with instances of the AI because that is more rewarding.
My nihilistic prediction is that our evolutionary programming won't be able to keep up with technology past a certain point, and instead we'll just be held back by our animal programming.