We Cybertronians have no such bonds. We have mentors, we have mechs that teach us life lessons we can never forget, the lucky few have spark-siblings, but "uncles" and "fathers" do not exist in the literal sense. Figuratively...I can see it.

[He's been called a "dad" by several members of the Lost Light crew when said bots learned of the Earth term.]

The bonds we forge during our lives - the ones made by choice - are necessary for Cybertronians. It's almost everything that we have.