You assume everyone and their grandmother has Apple-equipment.
Most of the world doesn't.
Saying that you will only do business with those who has Apple-equipment is leaving out most of the market, and doing so would be suicide for most businesses.
Technically true, but most of the world doesn't matter. Only the part which has disposable income does. The more disposable income, the more it matters.
Last I heard, Apple had around 50% market share in the US and going up. And I'm betting that it's the 50% that matters most.
Most of the world doesn't.
Saying that you will only do business with those who has Apple-equipment is leaving out most of the market, and doing so would be suicide for most businesses.