alt Hacker Newsthe "usefulness" excuse is irrelevant, and the claim that phones/internet is "immediately useful" is just a post hoc rationalization. It's basically trying to find a reasonable reason why opposition to AI is valid, and is not in self-interest.
The opposition to AI is from people who feel threatened by it, because it either threatens their livelihood (or family/friends'), and that they feel they are unable to benefit from AI in the same way as they had internet/mobile phones.
The usefulness of mobile phones was identifiable immediately and it is absolutely not 'post hoc rationalization'. The issue was the cost - once low cost mobile telephones were produced they almost immediately became ubiquitous (see nokia share price from the release of the nokia 6110 onwards for example).
This barrier does not exist for current AI technologies which are being given away free. Minor thought experiment - just how radical would the uptake of mobile phones have been if they were given away free?