Why do people act like coffee in the morning is such a sacred routine but soda in the morning [basically the same drink] is lowbrow and unhealthy?

like, it's caffeine and water and brown, who cares. i drink diet soda so it's no calories, no sugar. versus the stereotype starbucks order, why is soda so demonized

the whole sort of basically woo stuff about oh there's antioxidants there which give you a 3% lower risk of skin cancer after the age of 65 like come on that doesn't count