Dowding’s law of services: the value of advice is inversely proportional to its cost. The quality of execution of that advice is directly proportional to its cost. ie professionals will tell you the right answer for (almost) free because doing it well is the hard part.
In the film Arrival, the aliens basically see time as another dimension – there are no surprises for them since they see it all laid out in front of them. (Kurt Vonnegut does the same thing with the Tralfamadorians in Slaughterhouse Five.) This is why they