That's a hard balance to get right - how do you include the "serving suggestion" without pre-combining the ingredients so much that it's all you can make?I think it's simply a different teaching method. Instead of handing people all the tools and saying, "Go build a house." they are going to say, "Here's a house, here's how WE made it. You can use these tools to build your own house, or you can just use ours, take your pick."
Or so that you're not picking out the carrot from the mixing bowl every time you cook because the default is carrot cake and you want to make black forest gateau?