the perceptions of "fair" and "unfair" are created by the human mind
life comes from life or nature
some beings or animals are born with mental or physical disabilities
some are born weak in rational or spiritual faculties
life is just the randomness of evolution
if life has dealt what you regard as "your life" a good hand, you are fortunate
but fair and unfair reminds me of the old Biblical phrase: "who is the pot to question the potter?"
