It's not me. It's a community which agreed on a guideline, standard, by-law, etc.
> You mentioned "property value loss" in another comment - that's not a thing.
No, it actually is. Demand will suffer in locations which are unkept and trashy. I would not buy a property next to a home that had cars parked on the front lawn. I would not want to live next to someone who thinks that's appropriate and most people would agree with me.
There's a reason we stage homes when selling - we want them to be as attractive as possible. The surrounding area, if nice, will add to the value because people want to live in nice places and around nice people.
I never said it's approporiate. I wouldn't want to live next to such house either. But I find it unacceptable that you would like to regulate that away, just like I don't think it's acceptable to regulate whether someone can hang their laundry outside or not. It's a uniquely American fetishism with defining freedom as "freedom to tell others what they can or cannot do". There's a reason HOAs exist pretty much only there and hardly anywhere else. I might find the sight of my neighbour's car unappealing - but you're the one who wants to regulate what they can or cannot do with it.