Well between
@battered and me that's 70 years of experience around the industry.
Of course we want to make products that people like and want to buy. Of course we/our customers want to make foods that taste good and that people want to consume regularly. That's done in a variety of ways in all different products, good bad and indifferent.
But people seem to think that we sit around with some magic formulas to sell as much salt/fat/sugar/unhealthiness as possible, or we have some magic ingredient(s) to make food addictive to children and we sit in secret designing how to do this...and it simply isn't true.
All food however it is produced even when cooked at home is made to have nice visuals, good flavour/aroma/texture etc. there are myriad food cues that make some products more appealing than others, the Industry is no different be it human, or animals, we all have preferences. It's why some go to 'The star of India' when pothers prefer the 'Taj Mahal' or people prefer the chips or batter at 'Joe's Plaice' rather than 'The Cod Father'.
Yes, we try to make foods that people like/want. But we're not setting-out to make them 'addictive'. Addiction comes from more than just consuming a certain type of food. I can see however there's a fine line.
'Moreishness' is most definitely is a thing, it's a natural thing. Understanding it is important both to sell products and also to understand overconsumption. People have been using moreishness since forever.