Just like you can buy a house next to Pylons, a main road etc etc. Let me use a girlfriend analogy.
You can go out with girls who are cute but have issues. Fantastic in the bedroom but occassionally you have to deal with their insecurity/abusive language etc etc.
Then there are girls who are cute, well-grounded, fantastic parents/childhood and you love them.
Both the above deteriorate with time however the latter you can see yourself growing old with. The former you are always worried about 'something'.