straightforwardness – it could well mean not to follow the straight line …

Taking the words from Keynes’ General Theory we have to see:

The classical theorists resemble Euclidean geometers in a non-Euclidean world who, discovering that in experience straight lines apparently parallel often meet, rebuke the lines for not keeping straight—as the only remedy for the unfortunate collisions which are occurring. Yet, in truth, there is no remedy except to throw over the axiom of parallels and to work out a non-Euclidean geometry. Something similar is required to-day in economics.

And even beyond geometry and economics, the seemingly simple solutions, bringing us forward ling the straight lines, may be fatal, especially while standing next to the abyss.