> The question that always bothers me is why Apple do not receive the same level of scrutiny.
Simply because Apple do not have a monopoly. Monopoly is a defined as greater than some % of market share. Problem with monopolists is they have too much market power so they can and do prevent competition, stifle innovation and over-price their products. None of these are good for consumers.
Some technical stuff here: http://en.wikipedia.org/wiki/Monopoly