They were extremely lucky to be 4-0. They could have easily been 2-2. But thats the NFL. They haven't looked anything like a super team though. And finally they didn't get miraculously lucky at the end of the game.
You have to appreciate the coaching job going on with the offensive side of the ball. Literally down 50% of your starters and Dak doesn't look phased. Jevonte Williams doesn't look phased.