That's true of 3rd parties in general though as they have shifted more and more to multiplat releases.
This. You need to keep in mind that this isn't the DS days anymore, where each platform had radically different architecture that often led to exclusives. Exclusives still exist, but they're not as ubiquitous now, since it's so easy to port from platform to platform these days, why wouldn't you want to do it? It's free money! That, and AAA game development is so expensive you need to release on multiple platforms for the most part.
With that in mind, The Switch is a good home for all the Indie and AA multiplatform titles on other systems, as well as a handful of exclusives sprinkled in as well.