Im appalled that carpooling is still way underutilized

Approximately 76% to over 88% of car commuters in the U.S. drive alone (single-occupancy vehicles). While roughly 91% of people use personal vehicles to commute, only about 9% to 10% of workers carpool, meaning the vast majority of cars on the road during rush hour contain only one person, which is horrible for the environment. You would think this day and age there would be a system where most people carpool. Uber, lyft, Turo , zip car and getaround are way too expensive to help much in this respect.