I think you have a wrong image of how this looks/works. It's not like there is a cany-shell or something. It's a regular, smooth pill. You usually do not notice this coating because you don't keep a pill in your mouth. If you were to, the pill would taste sweet.

If you ever have gotten a pill of some sort that dd not feel chalky on the outside but smooth and looked kinda shiny, that probably has been a sugarcoated pill.