and you? You castigate a poster for doing exatly what you are doing yourself. Ironically recursive.
It's important that the elites of this world understand what harm they and their tribes are doing, intentionally or not, because awareness comes before action!
Of course I am doing it ironically. That's not the point though.
If you think that someone at Coca-Cola Co. is going to wake up one day and say "you know, we are going stop making soda drinks and lay off thousands of people and cause unemployment for hundreds of thousands because after all,we produce a drink that's no good for anyone", then I think you are(just like OP) being naively idealistic.
Quite possibly. However, great changes only ever arise from apparently impossible tasks! You probably actually know that from things like Einstein's special relativity coming shortly after Lord Kelvin's infamous dictum, or Galileo standing up to the Church...
And yet with all this power in your hands, and with the limited time we have in our lives, you decide to go on Hacker News and comment how other people are not doing useful things? Even though for many people the process of making coke is literally the only way they can survive, and yet, they are the ones not doing anything useful? I think you are being naively idealistic at the very best, and just a hypocrite at the worst.