Even if it hasnt moved the rubber could potentially be perished and weakened with age.
Yes your absolutely right, for example if a brand new tyre is left unused, after a good few years cracks start to appear and it will loose its strength.
Same scenario as a belt. and to be honest, i would not risk it, as my uncle's lexus timing belt snapped and its wrecked the whole engine.
It will only bend a few valves.
Yes i know it will bend a few valves, But with it being a 24 valve engine, It aint worth it getting it repaired.
And wouldn't it be easier to change the belt or looking for a replacement engine?