"The few dozen people I killed pale in comparison to the thousands of people that die in car crashes each year. So society should really focus on making cars safer instead of sending the police after me."
Just because two problems cause harms at different proportion, doesn't mean the lesser problem should be dismissed. Especially when the "fix" to the lesser problem can be a "stop doing that".
And about water usage: not all water and all uses of water is equal. The problem isn't that data centers use a bunch of water, but what water they use and how.
The claim of linear runtime is only true if K is independent of the dataset size, so it would have been nice to see an exploration of how different values of K impact results. I.e. does clustering get better for larger K, if so how much? The values 50 and 100 seem arbitrary and even suspiciously close to sqrt(N) for the 9K dataset.
The compiler also tells you that even if you cover all enum members, you still need a `default` to cover everything, because C enums allow non-member values.