That's unfair. The TSA was established by people hiding behind 9/11.
What happened after 9/11 is that the government (rightly) acknowledged that airport security was run by a decentralized and largely ineffective hodgepodge of private and local security organizations. The TSA was a "reform" of airport security intended to centralize the practice and make it more consistent.
The TSA is obviously terrible and much of airport security is a farce. But this isn't simply a result of people begging for farcical centralized security theater; it's a consequence of centralizing airport security in the federal government and thus making it far simpler for airport security to be "responsive" to "new threats".
The TSA's incompetence and intrusiveness is largely an emergent phenomenon. It isn't a policy goal.
The monster in DC expends a lot of effort and money trying to keep the people asleep. It's the story about the frog and the boiling pot of water.
To roll it back would take a two term President dedicated to absolutely nothing else but that effort, and a Congress willing to go along. Scenarios like that only become possible during particularly extreme situations, either war or depression.