Well i didn't see any whatsapp, line, Snapchat, FB Messenger, Wechat etc adds. So seems like the competition can bring its products to the consumer without adds. So I uphold my opinion...
Also it's not like Apple didn't have any failures even so using focus groups etc. anyone remembers their 'social network' called "Ping"? Is it still out there ?
Again, you seem to not know how marketing and advertising work, and why companies spend so much money on that.
The best selling vehicle in the US is Ford's F150 truck. It outsells the Toyota Camry around two to one. Most people know what a Ford truck is, yet Ford spends a tremendous amount of money creating TV ads devoted to the F150. Why? Because there are other truck brands available for truck buyers to consider and purchase, and Ford would prefer those truck buyers purchase Ford trucks.
Why do you care so much about how Apple chooses to market their products? Are you worried Apple marketing is ineffective and their marketing groups need some help to make the company successful?