People love to build arguments on piles of “facts” which nobody would be able to question in a timely manner after the final conclusion is done. Both consciously and not. Cutting this flow of nonsense short is essential for communication and negotiation, especially in gullible/hierarchical groups like family and friends (YMMW). I find that most of the times when I listen to a lenghty monologue, it serves a persuading rather than an informing purpose. 5 minute “ted” voice messages are the extreme example of it.