Your description of this is disingenuous as it doesn’t reflect what the origin of this idol was. You know your information is wrong yet you post it anyway.
An apparition claiming to be Mary made certain promises of avoiding the hellfire IF the wearer followed the rules correctly. In other words it caused the deceived to trust in the words of an apparition over the inspired words of the Bible.
Your opinion. You show no facts that support that anyone is worshipping a medal or piece of cloth.
The whole Bible and Sacred Tradition is about doing God’s will to avoid Hell.
The Blessed Mother and Jesus have both appeared to help us on the path to salvation.
It is apparent that they appear to Catholics to help us lead more holy lives if we follow them.
Do you pray the Divine Mercy prayer that Jesus gave to St Faustina (approx in 1939)?