Not at all. Actually the opposite.
The idea is that if you import a Japanese ROM, and it's clear that the game is indeed a game from Japan, and there's a Japanese image on the GamesDB that can be downloaded for it, we download that for you.
If the game doesn't have any identifiable region, we use your Region Priority to determine which image to download.
There's more steps than that, but hopefully that clears things up a bit.