I have never heard of railway=facility and it doesn’t have a wiki page, I am not sure what it is thought for, although it has 9000 uses (almost all on relations). https://taginfo.openstreetmap.org/tags/railway=facility#map
There are more than 7000 railway=station on ways, I do not see a benefit in discouraging its use, rather we should discourage representing something as big as a railway station, with often several entrances, fenced off etc., as a single node. What is the benefit of a node? I do not believe we need to enforce public_transport=stop_area relations just to be able to map the extent of a train station.
You can propose to change the system, but just applying the changes to the wiki is not the right way to achieve it, the wiki should document what is actually done, and railway=station areas are a valid and established way to map.