We are concerned about all possible tracking options because of the safety risks.
For starters, it allows more space for and to ultimately deliver as good performance for the size of the device as possible.
And it fits snugly over your AirTag, so you never have to worry about it falling out.
But, that said, there are millions of iPhones and other Apple devices roaming around out there to help if you find yourself searching, say, a park or a school campus for the keys you dropped.