Yeah, I'm a bit surprised about that too..
Maybe the 'VS staffer' wasn't 100% clear of the reasons for seats to be in a particular position for take-off and landing....
Back to thread.
I would say move your seat when the seatbelt sign has been switched off.
I just always have it in the back of my mind, that there is always the chance of something happening that we (cabin crew) are not aware of, and the slim chance of having to return to land for whatever reason.
Obviously, if the seatbelt sign is on for 2 hours because of turbelence, I'm assuming if something like that were to happen, you would have heard something from the pilots within that time, so it would be safe to move your seat. Whilst keep your seatbelt fastened of course.!!
It's a little bugbear of mine unfortunately. When in First, and the purser rushes round trying to get everyone to bed, but the seatbelt sign hasn't even gone off yet. In F you need to get off the seat so we can arrange the mattress and duvet.
I just think it sends out the wrong messages from us.