This will lead to more errors introduced. I’ve seen this changed many times. Often stating “fixing a problem” when the person has no clue if it is a bridge or a tunnel. A way crossing a stream is much better than someone creating a non existent tunnel (or bridge).
What is the actual problem being fixed? Where does it cause an issue?
It looks like the challenge looks for layer +/- without bridge/tunnel and bridge/tunnel without layer=*
It’s ok as long as the user make the right choise but as Anders says, there is a rish people blindly slap on tags to get questpoints.
I’ve also seen places where people have crossed bridges with tunnels where there should only be a tunnel OR a bridge.
A while ago I did an overpass-search for waterways with layer tag and a way length > 100 m (or something like that), since waterways are usually not underground for so long distances.
But since it is almost impossible to see in aerial photos whether it is a tunnel, culvert or bridge where the waterway crosses a road, I only split the ways and gave it layer=-1 exactly where it crosses the road, not a longer distance.
Since it is almost impossible to see from aerial photos, I am a bit hesitant to the added value of this challange…