It's possible to use them to automate easily without needing a custom setup for each item. So, if you want to make a factory for EVERYTHING you can do that, while if you want to use autocrafting tables from BC you need a table and resources to make at least one of the item, for every item you plan to make, as well as the resources for either lots of piping or logistics pipes. Craftpackets can be automatically moved by a sortron as well, so all you need is programming knowledge and a steady supply of reeds to make a factory, no time required to collect the items or put them together yourself - which comes in handy if, for example, you want to make something with a lot of parts (like a GraviSuit)