is to imply that BECAUSE it didn't make money (or as much as expected), it's therefore a bad movie.

Which is a bullshit argument to begin with.

There are obviously great movies that make a shitload of money (e.g., Dark Knight), bad movies that make a shitload of money (e.g., Matrix Reloaded, arguably Titanic), great movies that didn't make a shitload of money (lots of them), and bad movies that didn't make a shitload of money (a whole bunch of them).

So there really isn't much point in bringing up money-making when talking about a movie's quality, since neither one is a good indicator of the other.