I have seen that the path is visible again. The locals mentioned above are not really local. They are German hikers and experts in the region (some of live on Tenerife since 10 or 20 years). They urged me (and I was in the Anaga region last August / September) to remove the path. The simple reason is that there is no path! And the area is really dangerous!
One of the locals mentioned that the reason could be that a geo-cacher tried to find a geo cache at the Semaforo.
If there is an accident on the path, the OSM path is maybe one of the causations. I would not bear such a risk.
The experts / locals told me that the responsibility question is not easy to answer. If you are an experienced hiker, you are already responsible for the whole group. You are treated as a professional guide and it is recommended to have an insurance.
Moreover please note that that path in nor far away from the restricted area of "Reserva Natural Integral de Ijuana". The path contributes to the destruction of the "Parque National de Anaga".

maybe I am unexperienced mapper and maybe there is an OSM ethos. But local people living in tenerife asked me to delete the path because there is NO path and the area is extremely dangerous. So, life is more important for me than such an ethos. I was 1 month ago on Tenerife and in Igueste de San Andres. I validated what the people told me. Note that every year hikers die in the mountains of Tenerife.

I tried some of the paths in the Anaga mountains. OSM is not always correct and again there are a few really problematic paths. But its OK for not to update OSM.

Game over.