One of the main arguments is the fear that consumers will reject the product. You probably know that the industry spends a lot of money to develop new products. If the market does not exist, it would have been a very unfortunate investment.
The second argument is that it will cost retailers too much. However, as we saw earlier, this does not necessarily entail enormous costs.
Those are the two main arguments. However, the issue is not just knowing whether this is bad or good for our health. Knowing what we eat is a fundamental right. In fact, labelling already exists in 64 countries. We often hear about the European Union, but India, China and Australia also have some degree of mandatory labelling. North America is really lagging behind on this.