"No one can predict the future exactly, but we know two things: it's going to be different, and it must be rooted in today's world."
Which says the exact same thing. You can't just ask someone. You have to understand them.
Except that's exactly what people wanted.
Humans settled for combustion engines with all the attendant downsides because it is not possible make a faster horse (or human).
But you are right that a faster horse is exactly what they wanted – just not literally. The words they had to describe what they actually wanted hadn't been invented yet, so they had to fumble around with what was at their disposal.
Which, of course, is the point of the quote: Don't take what people say at face value. Understand what they actually mean.