[quitit]

That's a naive point to take for two reasons:

1. You're not looking very hard, surveillance ware exists for employment, examinations and so on. It's not available on iOS, but is available on Android via side loading. Both Facebook and Google used iOS certificates to side load tracking apps onto iOS for regular consumers. Even rental cars brands have utilised surveillance software to track speed and apply fines. The more you dig here the more you find: it's not some outlandish concept.

2. The inability to run such types of software on iOS prevents these approaches from moving forward across the industry. Much the same way that QR codes weren't widely utilised until both Android and iOS supported it.