Is there specific value in the talks being slide-less? I see that written reports are much better at conveying in depth information than talks, but if there is

Is there specific value in the talks being slide-less? I see that written reports are much better at conveying in depth information than talks, but if there is a talk and a written report - say a conference paper and associated talk - I judge them as two very distinct things. The paper may be great, but the talk terrible (or the other way around). But the paper will also take me several times the investment to read than listening to the talk.