Yes; nonetheless, you may personally find the need to track more closely than some of the meeting leaders/materials suggests.
The Canadian FAQ which explains why some foods are vs. are not 0 gives some insights into the thinking: link
More generally Simply Filling Technique (formerly Core) and the zero points food lists are based on the principles of Volumetrics from Barbara Rolls research at Penn State: amazon book link
Basically Volumetrics says that most humans eat a constant weight of food each day. So if you eat heavy, but less calorically dense foods then you will feel fuller. E.g. if you normally eat X lbs of food a day, better that that be X lbs mostly broccoli and chicken and other similar foods than chips/candies/etc which tend to be very calorically dense.