I don't disagree with you, but think that people like this because it feels good to perceive potential greatness in a prospect who is on a hot streak.
There is reason to hope that Ryan could become a #1 or #2 pitcher. I have hope for this kid and that hope makes me happy. This has been a depressing season and Ryan is helping some of us feel less disgusted. You are clearly correct from a factual perspective, but please consider that the hype may be giving him some extra confidence and he may even match the hype over time.
It might also help to turn off the sound on your TV -- kind of like being at the game in person because there are no announcers. Then you don't have to listen to any hype, and if you see Ryan have a bad night then you can (if you wish) turn the sound on to hear the announcers make excuses and/or eat crow, I have watched entire games without the sound, because the announcers can be annoying,