There is no such thing as an “unbiased” person.
There are only people who refuse to admit to their own biases (which allows the biases free reign to take over) and those who acknowledge their biases (which potentially offers some modicum of effortful control over them.)
Some biases are baked right into our DNA. The best we can do is to try to notice and acknowledge them.
Other biases are cultural. The best we can do with those is to notice them and ideally, try to replace them with somewhat healthier biases. But that’s pretty much the best we can do.
This sounds fatalistic and defeatist, only until you realize just how difficult and rewarding it is. Then you realize how optimistic and affirming this outlook secretly is. (That takes a while.)
The funny thing is that ultimately, either one of those conclusions, defeatist or optimistic, will be in part, the product of personal bias.