You can have faith in a person, if that person has demonstrated that they are trustworthy.
That's not faith. That's trust. While the word "faith" is a somewhat nebulous term and can have multiple meanings (sometimes synonymous with words like conviction, hope, etc.) it is being used in a VERY percise manner for this thread. We are talking about the sort of faith mentioned in Hebrews 11:1. Specifically, believing something without having evidence or contrary to the evidence simply because you want it to be true. Having "faith" in a person because they have demonstrated their trustworthiness in the past is no equvical.
It would be like if this thread were asking if we should preserve the natural habbitat of wild cranes because they are going extinct and then someone saying that, "cranes are great because they help unload cargo off of ships." Clearly these are two entirely different things.