If you remove a vehicle lane then traffic is reduced. Pull up the sidewalks and loitering pedestrians disappear. Remove the parks and there will be fewer people sleeping in parks. Under-inclusive metrics generally lead to poor decisions.

Vehicles are the only things that use traffic lanes.

Pedestrians are the only things that use sidewalks.

Heroin addicts are not the only things that use parks, unless your neighborhood is very disjointed and sad.