Comparing soda to cigarettes is ridiculous. People like soda, and in moderation, it is completely fine. There is no reason to single out sugary sodas to try to "solve" obesity. It is a consumer problem, not a product problem.
We all know individual consumer action could technically make the difference between an obesity epidemic and a healthy country. We all also know that individual consumers will literally never take that action, be it health or any of the other myriad ways that corporations are fucking us over. It's time to stop suggesting it. The point of governments and other central organizations is to coordinate, because large groups of people can't coordinate, and without coordination collective action just doesn't happen.
Sorry, I don't need collective action to tell me what soda to buy, or what beverage to consume. What a silly notion. I take action myself to moderate my soda intake all the time. Your assertion that this is not possible is simply absurd.
The aspect you are missing, as always in these discussions about government regulation, is the role of parenting and family in the job of nurturing healthy lifestyles.
And no, corporations are not "fucking" anyone over. They are making something people want. The problem lies elsewhere.