Microsoft is not just Microsoft. It's the cottage industry around products like Excel. It's all the other PC applications. It's WHQL getting hardware vendors into the fold. Compare all that to Apple. Apple is big, but not compared to the greater continent of Microsoft. People are more concerned about Apple's walled gardens than Microsoft's. It's no coincidence that Apple has taken more heavy handed actions to rule their platform more. That is why their platform is smaller overall and why people don't trust them.