Isn't it exactly the opposite? Checked exceptions are for libraries to declare "exceptions" they can't handle themselves. You, the user of the library, have to deal with them (or declare them checked yourself¹).

I'm not a friend of checked exceptions myself, but I still think it's the opposite.

¹ which leads to the real issue with checked exceptions: they propagate through dependencies, if one nested dependency adds another checked exception, all dependencies have to add the exception or handle it themselves.