The particular use of most of these will usually be apparent in the name. Creating distinct new tags where established usage already exists will likely lead to confusion, as many contributors tend to pick the most common and best established term anyway.
I appreciate that the wiki descriptions of many of these may be specific to Europe or western countries (e.g. wayside shrine is currently written to be specific to Christianity and nothing else) but this is often because there has been insufficient updating of the wiki as usage in other cultures have increased.
Tagging motorcycle repair and services looks fine.
How do we tag flour mills.? These mills are common in urban/rural India(or atleast in Karnataka) in areas with sizeable population, there are mills which host huge machines which grind whole-grain wheat, millets, rice, etc.,. Instead of buying packaged wheat flour, many people use these mills to grind wheat. As of now, there’s no shop=flour_mill tag.