An over stressed airframe has the potential to be unsafe (though Cessnas in particular seem extra safe it this respect). Skillfully executed maneuvers, which might include aerobatics, can be conducted well within the stated stress limits.
Stress not exceeded, so strain not exceeded, and no fatigue cycle life limits (on a 172 anyway), means no harm done, no matter how many times done, means fly with confidence.
I have had inflight structural failures in aircraft, but they were most certanly not the type caused by previous pilot inflight operating techniques.
I fly with confidence, and I would (and have) willingly fly a previously rolled 172, if the pilot who rolled it left it for me to fly. I've flown much worse!
Pilot DAR