I would say with 99% certainty it wasn't stock tires.
Tesla specs special tires because one of their selling points is "look how quiet EVs are and how little maintenance they need". Said special tires have increased mass over normal tires. Tesla also needs to spec something that delivers a reasonable service life under a big heavy Tesla. You can't just hand wave and say "it's a 700hp rocket, of course it eats tires" because that doesn't fit their brand image. Then there's rolling resistance. They can't spec something that has a ton of rolling resistance because it would tank range.
All of those design criteria require trade-offs from traction and each other.
Tesla specs special tires because one of their selling points is "look how quiet EVs are and how little maintenance they need". Said special tires have increased mass over normal tires. Tesla also needs to spec something that delivers a reasonable service life under a big heavy Tesla. You can't just hand wave and say "it's a 700hp rocket, of course it eats tires" because that doesn't fit their brand image. Then there's rolling resistance. They can't spec something that has a ton of rolling resistance because it would tank range.
All of those design criteria require trade-offs from traction and each other.