Why is land subsidence bad?

Why land subsidence is bad is because it causes damage to buildings, infrastructure, agriculture and environment, with significant economic and safety impacts. Subsidence is sinking of ground surface due to removal of underground material like groundwater, oil, coal, or compaction of soil, causing ground to drop 1cm to 10cm per year, sometimes metres over years. It is bad because it cracks building foundations, walls and roads, causing structural damage costing $10K to $100K per house, and in severe cases buildings become unsafe and need underpinning $20K to $50K. It damages infrastructure like pipelines, sewers, railways and roads, causing leaks and derailments. It increases flood risk because land sinks below sea level or river level, as seen in Jakarta sinking 25cm per year and Venice. It damages farmland by changing drainage and causing waterlogging. It can cause sinkholes that swallow cars and houses, safety hazard. It is often irreversible, once aquifer compacted, cannot be refilled, permanent loss of storage. In Australia, subsidence from mining in Hunter Valley and groundwater extraction in Perth causes building damage and coastal inundation. It also affects insurance, many home insurance policies exclude subsidence unless sudden, so homeowner bears cost. So land subsidence is bad because it damages buildings, infrastructure, increases flood risk, is costly and often irreversible.