Anything can technically kill anything if you are pedantic and creative enough. But at that point every statement becomes useless. Especially when a work of fiction is concerned.

Yeah, approaching these things with stringed logic breaks them usually. Same goes for vampire reproduction for example. If they turn the people they feed on, how come the world isn’t filled with vampires by now? There should be exponential growth in the number of vampires. Or Dracula needing to sleep on sacred home soil. Does it have to be from his exact crypt? How does he know the limits? Could he dig 1000 meters down and the soil would still work? How does a new vampire find their home turf, if they don’t have a family with a crypt?

You can go on endlessly poking holes, but that just takes the fun out of it. A good level of suspense of disbelief is always needed to enjoy those stories.

Dracula cannot be killed by sunlight. At least in the Bram Stoker novel. He’s out and about during the day quite a bit. What sunlight does, is keep him from changing shapes. Same for garlic, crucifixes and holy water. He can’t stand them and they weaken him, but nothing in the text says they would be fatal. Silver isn’t even mentioned.