In my opinion, gurus videos that you have seen are talking about the general store, if you put the link of the category in your post, your potential customers will open the page and see the products that dont really need and risk to abadon the initial intention of purshase.
On the contrary, if it's a niche store website ( as in my case) , they (clients) open the page and discover different products that they will 100 % appreciate. In result, your customer will buy not only one but several products. In general, this what happens in my store