This is the reason you physically move the wing up and down on walkround, it may not show up all problems but if something is already broken you will hopefully pick it up.
it has been said that there has never been a failure for the structure due to flight loading, of a strut braced Cessna.
when I learnt (1973 at BOH) there had just been someone killed in a (non AERO) C150 - my understanding at the time was that this guy had aeroed it, overstressed it and it had failed structurally,
ASN Aircraft accident 24-JUN-1973 Cessna 150C G-ASHF