why new object in javascript is not recommended code example

Example 1: object object javascript

person = {
    'name':'john smith'
    'age':41
};

console.log(person);
//this will return [object Object]
//use
console.log(JSON.stringify(person));
//instead

Example 2: keyword new js

function Car(make, model, year) {
  this.make = make;
  this.model = model;
  this.year = year;
}
//create a object with three keys, make, model, and year

var myCar = new Car('Eagle', 'Talon TSi', 1993);
// use the new operator to create any number of car objects with this template object Car above