There are people who, while not that crooked, will ignore a lot of cracks. This is a picture of the front spar in a 172's horizontal stabilizer. Those cracks are from pushing down on the stab to turn the airplane on the ground. Cessna used to have that technique in their POHs, but once the cracks started showing up, they forbade it, and sent out SBs on it. One 172 I ferried turned out to have the spar broken all the way through, with only the skin offering any stiffness there.
Multiple stopdrills to try to stop it. Cessna allowed that. We pulled the stabs off and had them rebuilt with the Cessna reinforcement kit, but still forbade the pushing-down technique. Towbars only.
This is a shot of the aft side of the left rear doorpost in a 172, with the Cessna-provided reinforcement. That area cracks as the whole bulkhead flex when taxiing over rough ground, or landing in a crab. The crack is impossible to see unless the interior stuff and floor inspection plates are removed.
Any higher-time 172 will have that cracking, on both aft doorposts. It is a huge pain to fix. If it's left unaddressed, the bulkhead flexes more until there are cracks everywhere, top and bottom. That bulkhead as the wing's aft spars connected to it and it is carrying some of the airplanes weight. And yours.
This is the bulkhead immediately aft of the baggage door in a 172. It cracks and the one opposite to it, on the right side, also cracks. That big rear window Cessna put in in about 1966 did that, by making the aft fuselage more flexible through that area. Yaw forces cause the bulkhead to flex as it tries to maintain the fuselage shape there. If a helper pushes the tail left and right you can see it flexing.
See the crack across the bend? The sheet was forced into a compound curve there, stressing it, and with inflight flexing it work-hardens and cracks. Again, unless the interior is removed, all of this stuff goes unnoticed. When it goes far enough, you're faced with replacing the bulkhead instead of repairing it, and the airplane has to be taken apart at that point. Tailcone clean off. Not cheap.
Saving money at annual time is not a savings. It's accumulation of defects that will sooner or later cost you, especially if a prebuy finds it.