Because the garage is full floor-to-ceiling with trash and the household owns 3-4 cars. There are numerous houses on my street that do this and, at times, the street is so choked with cars on both sides that it makes it very unsafe to drive and cycle through. Especially if they park trailers or boats out on the street. Extremely limited visibility and like a hands-width of clearance on either side.
My family of 5 owns 4 cars (I've moved out and ride a bike). I'm so sorry families like mine exist lol. They know my feelings on cars and even agree with a lot of what I say because it's pretty incontrovertible. But in the end they don't really care. They metaphorically pat me on the back for riding my bike and continue to live their privileged life style that makes life worse for the rest of us.
Rich people literally don't give a fuck about anyone else. They donate to charity and feel genuinely sad for unprivileged people but will fight tooth and nail against anything that remotely threatens their way of life.
Biking has nothing to do with being poor, there are $5000+ bikes and many people who buy them. Go to any EU country, and people of all socioeconomic status bike. Rich, poor, old, young, pregnant etc.
Because they didn't have to pay for that land, the city plows and maintains it, the city repaves it, your partner doesn't complain when your project car leaves oil stains on the curb. So basically entitlement to public land is what they insist on.