Legit science isn’t based on faith. But we’re talking about the theory of evolution, not legit science.
Science = systematic knowledge of the physical or material world gained through observation or experimentation.
Microevolution (relatively small variations that can cause the formation of a new subspecies) is observable so it’s science. Macroevolution (formations of entirely new species) is not observable so it’s not science. If it was, we’d be drowning in evidence. The missing evidence is replaced with extrapolation, air and sometimes outright fraud.
Just because you are apparently unable to understand or haven’t looked at or for the evidence doesn’t make it nonexistent or missing or fraudulent.
Look at the university library at the volumes of the publication “Evolution” alone - or of the many journals dealing almost exclusively with evolution - if pages were water one would most certainly drown (if unable to swim).
The nature of science is extrapolation. The weights dropped by Galileo off the tower of Pisa were not said to be relevant only to those weights at that location - but extrapolated into a system whereby one could accurately predict the rate at which ANY object would fall at ANY location.
Just because we didn’t see our own Sun form through gravity and nuclear fusion doesn’t mean that the theory of stellar formation is in any way lacking and not applicable to our own Sun.