Because a lot of people on the internet are from America and have the natural reflex to compare issues to their homes.

Americans also have a focus on their private prison system due to many issues ranging from modern-day slavery, racist takedown of minorities, and abuse of our mentally ill.

What percentage of the population in your country is currently imprisoned? Do you know the stats of minorities vs. imprisoned minorities for your country?

It seems to me like this information is more present in the minds of Americans, thus easier for them to comment comparisons.