This is very relevant to FOSS. Why isn't there a good FOSS foobar? Because you didn't build one.
"But the users will suffer frustration and anxiety and leave if there's friction..." Oh yeah? I think they must suffer some friction and anxiety anyway, since they're not participating. What are they doing? Abandoning their search for something which solves a problem or answers a difficult question, to doom scroll on social media? See that doesn't make sense.
As with Stack Overflow, AI is simply revealing the underlying flaw. We still need something to replace it. We need a better mental model.