I think even a lay person would be able to make some good observations about any product. Then across hundreds of employees you could start to build specialized teams.

But also, you don't want people to be too close to a range of products so they can be somewhat objective. For example is swimming shampoo a real thing? or is it just normal shampoo that costs more?

Here is Australia there is a range of over the counter pain killers, all the same brand, all with the same active ingredients, but marketed at different kinds of pain, and at different price points.

https://www.bbc.com/news/business-36167011