Yep. Human brains are made to see faces in clouds - and patterns everywhere. Because its the only way for that little brain to function. In reality nothing is the same unless it's identical (not a copy - but the exact same thing, maybe seen from different angles or at different times). We like our clever analogies, and they serve a purpose, but even when making them it's best to be aware that it's a product of our brain and to always be ready to question if it actually serves the intended purpose. Even if you can use a specific analogy in one context doesn't mean it's useful in another one. I think it's okay to make such analogies - as long as everybody including the person making them is aware of the shortcomings and that being able to make one is a very, very low threshold, given that it comes from brains that see animals and human faces in floating water vapor.
