It's a joke. Begging for water obviously being a horrendous situation to find yourself in while living in the richest country in the history of human civilization and using bottled water to cook pasta obviously not acceptable or comforting in anywa way shape or form.

The joke is provided context by the second sentence which states that these situations are in no way comparable (referencing the OG comment that Flint managed) because the water in West Philly is totally fine.