have just found this.
i think the whole point of slimming world is to cater for a wide variety of users, and some of those users will find it hard to stick to if everything they eat has to be made from scratch. I think as far as mugshots, mullers and pasta n sauces go it is a convenience aspect that makes this plan appealing to those who need it.
nothing about sw is pointless, it just caters to different people in different ways.