FransWillem (2019-05-24 14:16:56+00:00): Hi
I am a "armchair mapper" as well and try to map as good as possible, lead by the wiki's and information on Slack.
This is info of the Higway tag africa wiki

highway=track 	Unmaintained Track Road 	Access route from dwellings to agricultural and forestry areas. Roads within National Parks and Game Reserves may be tagged as tracks. No connection function between settlements.

May be passable by vehicles with 4 wheels, motorcycles, bicycles, or foot traffic.

Indicative info only - can vary. Width: 3 to 7 meters; may be paved. 

This is what the East Africa wiki says
Track 	highway=track 			This tag is usually used for roads providing access to agricultural or forestry facilities. In Africa, roads within National Parks mostly qualify as tracks too. If possible, please use also in conjunction with tracktype=*. Never use track to mark an unpaved or unsealed road in built-up areas. Such roads should be tagged according to the local conventions (usually highway=residential) and complemented by surface=*. 

Slightly different i have to admit
but take a look to this statement
of april 25 by r-aytoun 

r_aytoun [12:57 AM]
Hi @Greg Rose @Frans @russell.deffner I know the East Africa Highways tagging https://wiki.openstreetmap.org/wiki/East_Africa_Tagging_Guidelines  and it is perfectly in line with OpenStreetMap tagging guidelines. One of the things you will note in the imagery  is the lack of vehicles on the roads or at the clusters of buildings giving an indication of how few of the locals have vehicles. OpenStreetMap does not classify the highway by the amount of traffic but by it's importance and use. If a way in the town has been cleared to take a 4 wheeled vehicle then it should be shown as _highway=residential_ even if it is mostly used as a footpath. If it is too rough for an ordinary vehicle but can still be used by a 4 x 4 then it can be tagged as such, but the condition does not change the classification. If it is 1.8 metres or wider it can take a vehicle. Unclassified roads (I think the term unclassified is confusing  for a lot of mappers and minor road would be far more understandable) are those that take the local traffic through the region and have the access roads to the individual farmyards/clusters of buildings coming off it. The road to an individual farmyard/cluster of buildings should be regarded as a driveway and any roads from there to the farmlands/forestry will be a track. If you are a visitor to the area you should not be using a track to get to the house you want to visit, it should be unclassified and/or service . You should not have a service road/driveway coming off a track. Each one of us may have a different concept of some roads where the use is questionable and I would suggest that when this occurs then please tag me (RAytoun on OSM) in the comment or ask on slack (r_aytoun) with a screenshot and we can discuss it. It is also a point to note that summer the vegetation does make the roads seem narrower and in winter more of the road is visible.
I do understand you points and the frustrations which comes up when you see the mappings of others (including me)
But.... we all do our best to achieve something  

best regards