That's a decision for them to make. If they don't want it by all means don't force it. But to say you shouldn't talk to them is unfathomably cruel.
No population should be kept living a life we would consider extreme poverty out of some noble ideal. But we also shouldn't completely disrupt their way of life out of a different noble ideal. Wealth as we understand it isn't the only thing of value. Human connection, meaning anchored in community and deep roots, a sense of belonging and so on, are what really matter. Introducing modernity to such populations will sweep all of that away in one motion. These people would be left adrift in an alien world devoid of personal meaning, their only solace whatever addiction appeals to them most.
Why can't you say that about, idk, folks on welfare in the United States? How are they in a position to decide whether buying pop on food stamps is what they want or not? Maybe a woman doesn't really have the tools she needs to decide whether she wants to keep a pregnancy until she's had some counseling and time to cool off?
Obviously I'm not comparing these situations directly, and frankly I'm not sure you're wrong, but the point of view you are expressing here leads us to all of those scenarios and I think we should reconcile that.
It's certainly a complicated subject, but I'd just challenge you to think of the positive version as well, not just the negative (addiction/vices/&c). It seems you have a default negative view of the world, some of us have a default positive view of the world. Modern life is pretty awesome!
There might be something deeply wrong with the modern world (which by the way includes other countries ranging from, idk, Iran, to Vietnam, to Korea) but there are a lot of things deeply right about it: opportunity, human rights, women's rights, independence, opportunities to build rocket ships or sail the world. That seems like one hell of a gift that I wouldn't want to deny anyone. If anything, providing opportunities and giving human minds the chance to flourish and be creative seems less of a sickness and more of a cure.
Now imagine someone psychologically very average whose source of meaning is in the familiar environment where they have an acceptable amount of status, broad community support and much social engagement. They have a peculiar culture and social practices which gives them deep personal meaning. Now imagine all of that is swept away; no social status, no familiar environment, cultural practices gone, extended family scattered to the wind. What value does the wonders of the modern world have to someone who has lost everything they value?
Consumerism, technological marvels, and endless entertainment are the modern world's answers to the waning sources of personal meaning in modern life. Turns out that it's all a very poor replacement.