Why doesn't jQuery "do it kinda like this" ?

xQuery.js

function xQuery(selector, context) {
  if (xQuery.caller !== xQuery) {
    return new xQuery(selector, context);
  }
  if (selector === "body" && !context && document.body) {
    this.context = document;
    this[0] = document.body;
    this.selector = selector;
    this.length = 1;
  }
  // etc
};

xQuery.fn = xQuery.prototype = {
  constructor: xQuery,
  selector: "",
  xquery: "1.0.0",
  length: 0,
  splice: [].splice
  // etc
};

xQuery.fn.method = function() {
  return this;
};

// in chrome console
jQuery('body') instanceof jQuery // true
console.log(jQuery('body')); // logs like an array
console.dir(jQuery('body')); // logs object log jQuery.fn.jQuery.init[1]

xQuery('body') instanceof xQuery // true
console.log(xQuery('body')); // logs like an array
console.dir(xQuery('body')); // logs object like xQuery[1] (easier to understand?)