Things I don't understand about the world

Here are a few things that make no sense to me:

• Why do soda companies exist? Honestly, Coke and Pepsi have no place in the world. They simply hurt people's physical health, serving as one of the leading contributors to the obesity crisis.
• Why are people willing to live lives working in mindless corporate environments dominated by politics and lacking in passion? This makes no sense to me. Life is what you spend your waking hours doing, and people are willing to go through theirs playing politics in a large company?
  
• Why do people value material possessions so much? Studies have clearly shown that happiness is produced by: Family, friends, having *enough* money to be comfortable, doing work you enjoy, helping others. That's it. Why are people willing to work crazy hours in stressful and unsatisfying jobs to make money that they don't need? Seems paradoxical.
• Why don't we massively invest in trains to make them, as quickly as we can, the dominant form of transportation in the US, like they are in most other productive nations?