Analogies are frequently weak tools because they are describing something inherently different from the primary object, and the conversation then comes to be me

Analogies are frequently weak tools because they are describing something inherently different from the primary object, and the conversation then comes to be merely about enumerating those differences. If there is a good argument to be made, it can usually be made directly, without having to resort to making an argument vicariously about something else and then having to argue why it is equivalent to the first thing in the context of the original argument.