Why and how should demonic items be blessed before being destroyed?

Just listened to Feb 2nd, 2023 episode of Pint With Aquinas. Fr. Vincent Lampert says that a voodoo doll or similar items should be blessed before being destroyed. Is it possible to bless something evil? Guessing this is something only a priest should do, but is it only an priest trained in exorcism. And why would something need to be blessed rather than just destroyed. Should these things be destroyed if it's easier to just throw it away, because it seems like sometimes a proper blessing/destruction would take longer and increase the likelihood of demonic infestation?