Inconsistent map elements - handrails stronger than buildings?

DomoSapien: Yeah I always found that to be particularly jarring, as far as immersion is concerned.

I think the distinction lies in the type of building. Since the handrail (porch, stoop?) is part of the non-destructible model, the handrail/stoop is also non-destructible. 

Also, insert cheeky comment about how you should never be standing still in your wheelie boi here