Cars will be needed, period
Having said that, 90something percent of car rides are under 5 kms and can be done by bike IF good biking infrastructure is available
We MUST redesign cities to become humans first, walking and biking must be easy, smaller cars can enter to destination, smaller trucks can enter to supply stores, and that’s it. If you design cites for people and bikes, people will use it. Add good public transportation, and you’re golden.
Right now in 99% of the cities in the world, using bikes is suicidal, walking anywhere beyond a parking lot is suicidal. We gotta change that part.
Most people will stop using expensive cars if they can bike everywhere, or use good regular public transportation for longer trips.
Fortunately or unfortunately, this change is also political. Vote for the right people. Hey involved in local elections. Right to your local politicians. Attend town meetings if possible.