Difficult to call it sprawling given the geography, and I don't know what "pedestrianized" even means here since walking in many neighborhoods is both common and designed for.
There is plenty of accommodation for vehicles in Seattle, that is true. Even people that walk everywhere often own one in order to take advantage of the prodigious outdoor activities for which the region is famous.
It’s definitely very sprawling from Olympia to Mt Vernon. We only just managed to pedestrianize Pike Place Market. I struggle to think of a pedestrian neighborhood. Just cuz you can walk doesn’t rise to that level. Ballard no. It’s all cars and car parks. Fremont no. U district no. Cap Hill no. Queen Anne no. West Seattle no. They’re all car dominated neighborhoods without much pedestrian space and poor accommodation for cycling too.
Olympia and Mt Vernon are not part of Seattle. Does anyone think Segovia and Toledo are part of Madrid?
It definitely is sprawling compared to your typical European city.