If your definition of "blind faith" is broad enough that accepting things on "blind faith" is actually a good, fairly reliable predictor of possible future observations, then I think you should get a narrower definition.

For example, I accept on "blind faith" the fact that Australia exists. But if I got on a plane to Australia, I have every reason to expect that it will go to a real place called Australia, rather than secretly taking me to Botswana or something. By your definition, a belief in Australia and a belief in unicorns are both lumped under the category of blind faith, which I think is a really silly classification.

All our observations of the world -- even sight, sound, smell, and so on -- are indirect. Your eyes don't see all wavelengths, and they can be tricked into confusing combinations of red, green, and blue as "the same color" as a pure wavelength of light. And don't get me started on the preprocessing that happens before the signals even reach your brain! Will you categorize everything you see as being taken on blind faith as well? Where do you draw the line?