Regards context and clarity... I think you have it the wrong way around. Written english is far less easily manipulated than a two way verbal conversation.
I agree to an extent, but what I mean is if there is any ambiguity or anything not clear, on a call you can ask questions and either have additional context added or have it worded differently to make it clearer. That will take a matter of minutes. In a written statement you will have to write back, then they will need to rewrite etc which if you're lucky will be days but as we've seen with this more likely months. That's why I said the call followed by something in writing.