This would 1. help the elderly have more freedom. 3. help people who already use public transport. 4,5. It would make roads safer and allow for less space being used for private vehicles which makes the remaining spaces safer.
Improving intercity and freight rail can also help many people in category 6 who can now do something productive or fun on the train rather than risk driving long distance, and can take some long distance freight off of roads.
The only people who need to have private vehicles are those would live in rural locations, who would still benefit from traveling to a more distant urban area, and people who's jobs demand it such as tradies (trades people). These would all be served by having less people on the roads when they don't need to be.