That's all very true but any person using their own eyesight would have the same issues. This should be used as a narrowing of a search, same as Google's algorithm. Google doesn't give you the answers to your questions, they hopefully point you in the right direction, but sometimes don't give you a clear answer at all, but in clear and obvious cases it does match. Google also has programmed biases, but we all accept Google is one of the best tools.