You are missing the big picture: 

With car connectivity the future can hold the following,

COLLISION AVOIDANCE - could reduce fatalities and injuries by 30% worldwide (this alone is worth it)
ROAD HAZARD WARNINGS - If the infrastructure can communicate with oncoming vehicles, it can warn of road works or a reduced speed area. 
SENSOR FUSION, AUTOMATION  -Further steps in the benefits of connectivity can be achieved via sensor fusion, with on-board active safety devices, sensors and map data.
KNOWLEDGE BASE - All the driving data generated could be used to analyse situations, where safety systems take over in an emergency situation to prevent an accident. 
REAL-TIME TRAFFIC INFORMATION  -A connected car collects and makes position and speed data available to other cars as well as the infrastructure. It will reduce congestion, fuel consumption, and time spent in transit. It can find parking spots, fuel stops (Electric, gas, Hydrogen, etc)