Agreed. I live in a small country, so a city with 1 million people is huge to me. It makes me sad to think that in some cities where there are 10-100 million people. There aren't enough houses, space, apartments, food, money, and jobs for all the people in a city of 1 million. A city with 10 million is like a henhouse. You wouldn't put a single horse in an apartment building no matter how big it was, but stuffing the building with hundreds of people, that is somehow viewed as okay.
Also somehow related, it is so weird to me that when the world's population was much smaller and lots of people died before their 10th birthday, it was common (in many countries) to stone, hang, execute, and/or use guillotine. Nowadays, when you say that serial murderers and rapists should be executed, people will get furious and treat you as if you were a criminal yourself.
I read a news in which a man who murdered someone over 20 years ago and was sentenced to life in prison cried that he just wants to die and doesn't want to live in prison anymore. He said that all his prison mate friends had committed suicide, but he was too scared to try suicide. He wanted to be executed, but it was illegal to execute anyone in his country.