The UI is intentionally deceptive.
The text is deceptive. The big text says "Text anyone in your phone," which sounds great, but doesn't actually say anything about data sharing. The small low contrast text, describes what they're doing. They know that by putting it small and grey, most people wont read it.
The buttons are deceptive. It looks like there's only one button.
Even by putting all the permission stuff in a row on first startup is push ploy. Everyone knows, people just keep clicking OK until they get to actual app. People don't read the pages. People don't read the user agreements. They just want to get through the roadblocks as fast as possible so they can get to what they want.
None of this is by accident. All of these elements are chosen to push people towards the desired outcome, to upload your contacts, SMS, and call history as quickly as possible.