Take a look at the first line of the article:
Cooking rice on a stovetop can be fraught. Add too much water and you end up with porridge.
Then take a look at this line shortly afterwards: These devices can seem all-knowing. So long as you add water and rice in the right proportions, it’s nearly impossible to mess up
So in other words, the device doesn't actually solve the most important problem... The timing isn't particularly important, as long as you remember to turn down the heat as soon as it starts boiling.