It is your neighbor's duty not to live like a hillbilly and to have respect for his/her neighbors. As has been pointed out, there are many other reasons why these rules exist. The town doesn't generally give a crap about your sale price; they have other concerns.
Most towns tax your property based upon its value, they very much do care.
Furthermore, in areas with ordinances or by-laws, there are consequences to living like a slob. Don't like it? Move where no such rules exist. These ordinances or by-laws are known when you buy a house and aren't hidden.
Lol, you say that but it isn't exactly true. I'd bet that not a single one of you knows every ordinance that you are expected to abide by and I'd go even further that half of you either have broken or are breaking some obscure ordinance. I had a friend who had a retired asshole living on his block that had nothing better to do than go around and be an asshole with said obscure laws. One poor guy had to spend $500 because the gate to his fence was 2" too small per local ordinance. Funny thing was, he didn't have the gate built, it was there when he bought it 5 years prior.
You give me a couple of hours and I bet money I can find more than one thing that you currently are not in compliance with. Who cares if it isn't bothering anyone, rules are rules right?
Like many rules or laws which exist in society, there wouldn't even be a need for such rules if people behaved like adults, had respect for others, and took care of their properties. If you can't mow your lawn once a week or paint your home's trim once every few years, you shouldn't be buying a home.
There is no ordinance in my area about painting my homes trim and even better I can paint it any color I so choose. Since I don't plan on selling it and because I own a large construction company I can actually get it painted and shingled below the cost of materials (the manufacturers will actually give me the materials for free, tack the labor onto one of my projects and its virtually free). So I can let my 6 year old daughter choose her 3 favorite colors and paint my house god awful ugly as sin. Hell, my daughter would have a blast taking a paint brush and just splattering paint all over the house and you just can't put a price on the laughter and joy of your child. Maybe a random mixture of every shingle color my supplier has in stock (again, free)? Or how about bright red shingles with bright white ones thrown in to spell out a word or two, that would be pretty fun and also perfectly within code.
Generally there aren't any ordinances against lawn ornaments, if I was the lady I would take up as much of my yard with them as possible so there is less to mow. Looks just as bad but at least she would be within code. Personally, I like those big blow up things. Year round giant blow up snow globes, biggest blow up pumpkin she can find and sponge bob (just cause my youngest likes him, I prefer scooby doo) and she's reduced her work by 50%. No ordinance on how long you have to run them either so 15 or 20 minutes a day so that they are in working order and are actively being used but no real jump in the electric bill. Maybe a fuckload of cheap plastic gnomes for the rest?
The above is all perfectly legal in most areas of the country and will have the same, or worse, "effect". Do think I should be able to do that to my property or should the state dictate our lawn decorations and paint schemes too?
Luckily in my neighborhood we just help each other out, even when we really shouldn't have to because whoever we're helping is perfectly capable, because its the neighborly thing to do and frankly it solves the problem a lot quicker and easier. If that lady had lived on my block we would have turned cleaning her yard into a neighborhood BBQ and had a good time doing it. It's a shame so many have gotten away from common decency and genuine kindness.