I'll be convinced cars are a reasonable approach to transportation when it can take me as far as a horse can on a bale of hay.

That is such a beautiful analogy that now I will read your other comments.

Why do you think this standard you're applying is reasonable or meaningful?

For the same reason anyone would: if an AI can reason to a human level after having been educated in a manner similar to a human then it is likely that we [the educators] have captured something akin to human intelligence.