What you don't get is that this is the real Austin Murphy. At least for right now. To make the statement you did is ludicrious. If you can't transpose what you are in practice or the local regional tour with 3-4 other shortstops, then that is what you are. For a reverse example, please look up Tiger Woods winning his first Masters, Carmelo Anthony/Pervis Ellison/etc leading his team to the national championship game as a freshman, ...I could give plenty of examples. Seasoning might help, it might not. Austin has been playing in major competitions for quite some time and should have seasoning- Jr Nationals, World Jr events, multiple IPT events, DCC events.
Austin should know what pressure is by now & how to deal with it. The kid is 14 - I don't think anyone expected him to play and not miss.
I have said this a million times - pool players (& athletes) are just like race horses. They can feel the heat. When a horse is born, with the right training, he can become a stakes winner. If he wasn't born to be a stakes winner, he will remain a $10,000 claimer. As a $10,000 claimer he might run a mile in 1:38 but when he gets in a stakes race with the big boys he would be lucky to run in 1:48.
Austin should gamble some if he needs to learn how to feel the heat more. That will help him grow as a player in tournaments & challenge matches.