This kind of statistical analysis often reminds me of religions, where different denominations can look at the same source material but arrive at different conclusions. The Texans (and the Broncos with their offer) front offices saw those stats and thought there was enough there to make substantial, long-term offers. I can respect that. You have to take chances and gamble on the unknown in this league. As Frank Zappa once said, "Without deviation from the norm, progress is not possible".
But, then another angle looks at those same stats/results and arrives at a different conclusion, as detailed in that article. It should not be disregarded because it does not align with the Texans decisions or fan hopes, but it should also be kept in perspective and not become its own type of gospel truth.
Obviously time will tell which perspective is the correct one.
Personally, I do not think this team is built to be put all on the shoulders of the QB. With a top 10 caliber defense, and what is expected to be a solid, consistent run game, the Texans do not need a superhero QB. At this point, they need someone that can manage to move the ball and protect it from turnovers. If Brock can be more than that, great. But, he does not need to be a Superman right now, and that type of realistic goal and expectations is achievable based on what we've seen from him so far.