If you want a cyberpunk utopia you're gonna need heavy assistance from government, either directly or indirectly. As OP has stated with their stance of junk food, that it could be regulated to help control obesity. Sounds dystopic more than utopic. If fat people want to eat themselves to death, so be it, others don't need to follow that path and instead either balance their diet or go full on health nut. It is also a stone throw away from banning companies from functioning in the states or even completely ruining existing; like what the Pandemic did but eternalized.
Let's say you have a mega orchard, growing the sweetest apples around, everyone wants it and they are making bank because of it. Mr. Government comes in, wanting to change obesity patterns and thinks to start with sugar content as a foundation to define what exactly is Junk Food. Blah blah, the branches of gov do there thing and approve some sort of no big gulp cups regulation standard again. What does this mean for our orchard? In theory, nothing. However, the regulation and definition of junk food is defined that anything above 2 grams of carbohydrate content is considered junk food. Our orchard then needs to buy testing equipment to get the exact nutritional value of the crop, after some other committee has decided on what is a "proper" sample size to test the nutritional content. They spent 100K for new lab equipment and are banking on their apples to bring in revenue to pay for the sudden need for new equipment. Sorry farmer, nature had other plans to reward your hard work with an apple with a carbohydrate rating of 4.5 g per liter of pulp. The entire crop is deemed to be junk food and can not be sold potentially ruining an entire growing season for the orchard.
For a less speculative example, take patent law and pharmaceuticals. This is another example of laws with good intentions, like obesity regulations, actually give mega corporations the ability to become a monopoly legally. Let's say I am megacorporation, Laughizer, and the company just cured breast/testicular cancer using oral medication. It is a super simple recipe to synthesize the active ingredient, people at home have access to the chemicals to synthesize the medication at home. Good deal. However, I want to corner the market on this life saving drug so I need to turn to the one legal protectant I can; patents, trademark, copyright, etc. This is all approved, now, I have proprietary rights to the product. Sure it costs us a tenth of a penny per pill but I know people will buy it and I'm the only one in town who can offer it, therefore, I'm selling the full treatment for 2.2 million dollars while keeping generics in the dark.
This is an essay to basically say, regulation got us dystopia. I can't speak for every country outside of USA, but I'm sure there are similar regulations in place there as well. Ask yourself, has regulations helped you or has it made life more difficult? If the answer is it helped you, you're probably well off, I'd wager the other 99% would say it made things more difficult. Like the oil leases, drilling regs, fracking ban, etc. All government actions with the veil of a good deed (saving the environment). The road to hell is paved with good intentions and all that cliche.
