A top down view can’t tell you what a building or feature looks like in 3D. You can only teach an AI so much without more corresponding data. That’s why all the bridges in the world will likely need hand crafted polygons unless there’s a breakthrough teaching it to build it differently, say if oblique or side views are available and could be ingested by the AI.
Satellite photo Quality is partly driven by sales and reuse. If you live in someplace where very few are interested or needing sat photo data, chances are the pictures are poorer quality and fairly stale/old.
These are some of the current realities in trying to map and render the real world in a sim.