As others have mentioned, a pie is consumable, and thus a good one has value even if it isn't original.
But a slight change to the original scenario makes asking about originality much more reasonable:
Imagine you write a peach pie recipe over the weekend, and you give a copy of the recipe to your friend. They respond:
"Wait, how is this different from every other peach pie recipe that's ever been written? It seems really similar to another recipe I have."
That's not an unreasonable answer.
When I was in a band, one of the most valuable things my songwriting friends and I did for each other was tell each other when our work sounded like something that was already out there.
If you make a new piece of software and offer it to a friend to use, it's not unreasonable for them to ask how it's different from something that's out there already.
But a slight change to the original scenario makes asking about originality much more reasonable:
Imagine you write a peach pie recipe over the weekend, and you give a copy of the recipe to your friend. They respond:
"Wait, how is this different from every other peach pie recipe that's ever been written? It seems really similar to another recipe I have."
That's not an unreasonable answer.
When I was in a band, one of the most valuable things my songwriting friends and I did for each other was tell each other when our work sounded like something that was already out there.
If you make a new piece of software and offer it to a friend to use, it's not unreasonable for them to ask how it's different from something that's out there already.