Why is the car pooling not as famous as it should be?

Now you might wonder, for a concept to be so beneficial why aren’t there many going in favor of it. While there is no absolute protest against it, people generally are not very keen on sharing rides with other commuters in a car. We are living in a society where the norms dictate us to be wary of strangers. And it is not easy to come out of comfort zone, and socialize with others.
Also, people are quite wary when it comes to sharing their possessions, in this case, the car with strangers. This is probably because we find ourselves emotionally connected with the vehicle.  Of course, there is also the concern of reliability, security, availability, etc. that has to be factored in.