Why should I use Either<Left,Right> over exceptions?

I develop in Typescript and I'm often reading how I should handle errors with Either<Left,Right> instead of throwing exceptions. I've read about this so many times and I just can't fathom why I would ever want to do this. I assume I'm missing something so I thought I would ask here.

I'll briefly describe how I use exceptions in my web app. I wrap every API endpoint in a try/catch block. Further up the call stack I throw objects which are either ExpectedError or UnexpectedError. In my catch block I return an invalid HTTP response and an error message. If the error is expected then the user sees a relevant message, if it's unexpected then the error appears more generic to the user and gets logged in Sentry for review.

What exactly is missing from using this approach? Whenever I read into Either<Left,Right> it just seems like I would be introducing way more code into my project with no clear benefit. I understand that when the error is not something that should fail the user request then explicit handling is required, but that seems to be way less common and I can still do that? In most scenarios I want to end whatever the user is attempting and communicate to them why there was failure, exceptions seem far more efficient for that..