And an Apple MP3 player must have an FM radio built-in because all the other companies put them in their players.

I don't see the connection. Not all statements about Apple are wrong because one is. Apple sells about as many desktops to enterprise in a year as the average Best Buy and this is probably part of why.

My point is that most companies, like Dell, sell their consumer machines at a horrendously low profit margin. They make it up in enterprise sales.

Apple, however, sells consumer machines at a tremendous profit. The value you think Apple should see in enterprise is negated by their own business model being different from the industry norms.

My Apple MP3 player does have a FM radio built-in.

It's a less good example now they've added one to the nano.