I know this is just my personal experience, but I’ve found the try keyword immensely useful in Swift, especially when reading code, like during code review. Errors and error handling are difficult to get right. Having those places that can throw pointed out clearly forces the reader to think about error handling.
I can’t remember the number of times seeing that try when re-reading my code or reviewing someone else’s code triggered a conversations on error handling, and often resulting in improvements to the code.
Asynchronous code is hard to get right and having those places in the code that can cause a suspension point clearly visible seems like it would have a similar impact for me.