Queen Titania
Senator
Of course, threads follow the lines of normal conversation between people. I meant the same as you in your second paragraph - every obstacle is put in the way of an honest discussion -Of course the topic of a thread will wander all over the place. Threaded view helps us follow the topic drift of our choice. Without it we just go with the flow.
What I was addressing though was purposeful hijacking of a thread making it unpostable or worthy of locking. I may have spoken in hyperbole to get my point across, but that does happen quite a bit.