Lip service.
My best guess is that they did it so at some later point, they will have video "evidence" (for some court case) that they encourage their adherents to be friendly to worldly scum.
This. The example that they gave of "simplifying" and doing cart witnessing says it all - they'll talk about all these great ideals of helping others (even the evil worldlies) but when they give an example of how to put this into practical use it ALWAYS has something to do with handing out magazines. They give this example of spending more time cart witnessing, or they'll give their examples of helping someone with their yard work or their car or groceries - but it's always helping people when you encounter them while out in service. In the rare case that they hold up an example of someone helping someone outside of the context of being out in service, the story still always ends with a magazine placement at the very least, but usually a study being started.
Bottom line - the WTS NEVER encourages charitable works being done unless they're simultaneously pushing recruitment.