No, but the market wouldn't even exist if not for Apple creating it. iOS apps by its nature depend on Apple's technology. It isn't the same as restaurants or hotels that acquire customers through GrubHub or Booking.
Whether they would have or not is beside my point. The app marketplace for Apple's platforms is inextricably tied to their technology. A restaurant and a hotel don't have the same relationship with the platform that a macOS or iOS app do.