again with the false premise. The vast majority of traffic is business related, not just commuting. Wether someone goes to the park on a bike or not is just a side issue, and not what the original post was about.
According to the National Travel Survey 2021 only 3% of car trips are for business (see chart 10). The vast majority of trips are for leasure/commuting/shopping which can be done via other means.
Most people use the mode of transport most convenient for them, so the trick is to make more effecient modes of transport (i.e. not cars) the most convenient.