Promise example

promise-example.js

const doSomething = (err) => new Promise((resolve, reject) => {
  if (err) return reject(err);

  setTimeout(() => {
    resolve(42);
  }, 1000);
});

const log = value => console.log(value);

// Using returned promises
doSomething().then(
  // on resolve:
  log, // logs 42
  // on reject (not called this time)
  log
);

// remember to handle errors!
doSomething(new Error('oops'))
  .then(log) // not called this time
.catch(log); // logs 'Error: oops'

What's your opinion of just renaming line 9 to simply const log = console.log, or even omitting that line and just simply using console.log directly within the promises? You can save a line of code (>5% of the example), though learners would miss the opportunity of seeing the arrow syntax at work. Is there any other benefit for declaring your own log function in this case?