Hello Map-Finder,
Andy from the DWG here.  Actually, there are plenty of ways that you can have "alignment" data and never save it to OSM.  With JOSM, just add what you need to another layer and don't save that layer.  Even with iD you could create alignment data as a GPX file locally and drag it onto iD when open.
There are people (including me!) that actually create maps showing pipelines; we don't want small circles showing up at every bend in the road.
If you'd like help with how to map _without_ saving alignment data with fake tags to OSM, please ask at the forum https://community.openstreetmap.org/c/help-and-support/7/none .
Also, reacting in the way you did above really isn't OK.  Please don't do that.
Incidentally, you can still get to your alignment data even though it's been deleted from OSM via Overpass.  See e.g. https://overpass-turbo.eu/s/1KkV .