Amynicole
I think part of it was in a long range strategy to revamp its image after the mid 80's when not only did the membership begin to slide but and to offer a new way to slim and gain over their competitiors like i.e. Slimming World, Jenny Craig and others. The point system is to make things easier to calculate food values and you get a calculator to help you work out the points. Personally I do find it easier than counting calories but that's just my personal opinion.
But going back to your main point about points the way it has been promoted here is that this is a much easier system that will help you add variety and allow to eat the foods you love in moderation rather than when you counted calories, and if you realised they would cost you lots of points you are less likely to eat them.
Babs