"Without touching it ...". He touched the bulb glass on removing it from the package. I recommend using cheap cotton glove liners.
What reason would an owner have to believe that the stealership's mechanic would be any more careful as long as the bulb lit when he drove away?
Scepticism and Animal Faith (1923)
Scepticism is the chastity of the intellect, and it is shameful to surrender it too soon or to the first comer: there is nobility in preserving it coolly and proudly through long youth, until at last, in the ripeness of instinct and discretion, it can be safely exchanged for fidelity and happiness. (The Works of George Santayana p. 65)
Eschew eristical argumentation. I am responsible for what I write, not for your understanding of it.