Their intentions sort of don't matter. The food company and the grocery store are businesses, and the idea that a business should exist for anything except profit has become less fashionable. In any case, there are enough business owners/executives who believe this, and are not punished for it, that they will outcompete you if you don't.

The way to make a good profit in the food industry is to sell a lot of a product that you can sell for a good price, but have it be very cheap to manufacture. If you take really cheap input material that historically was used mostly for animal feed, like corn or oats, and can do a bunch of food science magic to it to make it very tasty and addictive, you can charge a good price and people will buy lots of it.

The problem with ultraprocessed foods is simply that the manufacturer has been given too many free parameters, and if they get enough they can find something addictive and unhealthy. Since shelf space on grocery store shelves is allocated based on sales, the shelves will be filled with addictive food. This is even true of the produce section. Fruits and vegetables are bred to increase their sugar content, reduce bitterness, etc. Luckily breeding fruit trees is more time consuming and less controllable than all of the chemistry that can happen in a potato chip factory. We will see how this holds up as genetic engineering becomes more predictable.

Anyhow the only solution we've really come up with to this social problem is to change our brains with Glucagon Like Peptides to be less susceptible to these tricks. We will see how long that is able to keep ahead of the food companies.