Witnesses are taught from the beginning of their JW existence to be rude in a very similar manner – the house-to-house work. For most householders the time of the Witness call is not convenient. So, all of us, as former JWs have been rude to the general public.
Same goes for the “shepherding work.” A simple phone call to schedule a mutually convenient time would be the gentlemanly thing to do. Similarly, COs (who set the example for elders) rarely call “weak” or inactive JWs ahead of time to schedule an appointment during their visit to “encourage” such ones. They just show up, or at least that was my experience in the old days of my JWism.
Regards,
Sam Beli