People sometimes think of a part without considering the whole

A little bit ago, there was a reddit post that I saw where someone was wondering why cities seemed to have so many financial issues even though people always say that they are the most fiscally responsible. When people started replying with one of the main reasons being suburbs. The original poster started replying to people that they never mentioned Suburbs and it wasn't related to what they were asking.

When I first reading the post, I was wondering why the person wasn't understanding that a city is not in isolation. People were explaining that cities often have a large suburb within its boundaries or close enough where there was a bunch of commuters from it, that cities have the smallest percentage of taxes collected out of every level, and the size of the fiscal hole is typically smaller than towns and suburbs. Within that last statement, people started explaining that states typically take money from cities and give them to suburbs.

This all made me realize that people always focus on a small detail, while ignoring the whole picture. It all clicked when I was reading an article and it mentioned a quote "People look at the tree that's dying and wonder why, while ignoring that the rest of the forest is in the same situation". There are some people who completely ignore what the goal is of a change or upgrade because the previous one didn't work. I've heard it when people say bike lanes aren't used when there's only 3 bike lanes that aren't connected. I hear it when there's complaints an apartment complex is proposed to be built and people ask why is it needed when there's a housing shortage of 700k units in an area.

I have two questions for the people reading:

1. Have you experienced someone like that where they are against an upgrade and focus on a single detail instead of looking at the big picture of why it's beneficial?
2. What have you told that person that made them think more about the overall picture?