I am in no position to judge nor to reason why people must resort to buying and acquiring idols just to prove their faith; just to prove that they believe in something or someone.
I was raised by Catholic parents, attended a Catholic secondary school (that spends most of the entirety of the semester praying the rosary, novena, 3 o'clock habit, angelus, going to first Friday mass, etc.). I live in a predominantly Catholic country (the only one in SE Asia)...so I should know.
But simply, I am amazed because I used to believe in them. Idols.