So as it is commercially impossible and thus for economic reasons there is a general agreement to allow aircraft taking off even with objects on the runway that could cause a serious accident
There are no absolutes where safety is concerned, it is
always a trade-off against cost/economics.
It's very easy to look back, with hindsight, and say that a runway inspection after the CO DC-10 would have prevented the accident. While that may very well be true, it ignores the reality of how airports and airlines actually operate.