It also has an advantage over soil that the remaining bits don’t need much extra support for the load above. This doc talks about it: https://stateimpact.npr.org/texas/2012/11/21/why-texas-doesn...
There's other issues, too, such as the lake that runs through the middle of the city, the underground rivers and cave networks in the area, and the unstable clay on the East side of town that expands and contracts with rain, causing all sorts of problems.
I don’t have sources myself but to me the porous nature of limestone seems like a benefit since water would easily flow to the water table instead of flooding in the tunnel.
Erosion seems like it would be a far bigger problem for tunnels in soil or sand than it would be for limestone.
Limestone, because it dissolves in contact with acidic water (and rainwater is slightly acidic) is also prone to sinkholes. Best to keep the ground stable by not exposing it to more water. It happens so often in Florida there’s an FAQ page. https://floridadep.gov/fgs/sinkholes