I almost always refrain from comments from people like yourself because it lowers me to your level. I did not mention that all water is absorbed into the ground. If very little water does get absorbed into the ground as you say, maybe you can explain to me why my 54' well I recently drilled has a 20 gallon per minute recovery rate? How do you suppose that water got there? Before disinfecting the well, we ran the 1/2 HP submersible pump with a 1" water line 24/7 and the water never stopped. Have you ever heard of an aqueduct? Living in a state that has more surface water than any other state outside of Alaska I am very familiar with lakes, rivers, and streams. A few years ago we had 10" of rain in 24 hours. The nearby town I grew up in had serious flood damage in town. Where I live out in the country I had zero standing water the next day and zero flood damage.
The following I found on the net.
In natural systems, floods play an important role in ecosystem functioning, such as by recharging groundwater systems, filling wetlands, and the promotion of breeding, migration, and dispersal of numerous species. In natural ecosystems, there is a lot of resiliency to the majority of flood events.
In contrast, in areas that have been developed by humans where the natural resiliency of ecosystems has been lost, floods can be very destructive.
Impermeable surfaces
In developed areas, such as in urban areas, there is commonly a large amount of impermeable surfaces such as roads and other concrete structures that do not allow water to permeate back into the soil. When large amounts of rain falls on these impermeable surfaces, the water can accumulate and lead to flooding in low-lying areas if it is not directed properly.