I think I disagree with the sentiment, but I definitely disagree with the conviction.
I think it's possible that chatbots will help people prepare and refine their relationship skills, such that "real" relationships are more likely and more successful. Think of chatbots as simulations, which are used in everything from medical to military to HR contexts. Maybe that's not all bad?
I'm 100% sure chatbots will be used in ways I'd characterize as "not healthy", but I'm not at all sure that's any of my business, or that those to-me negative uses will outweigh more positive usages.