But what if incorrect values have been loaded? I think the biggest risks are indeed during takeoff, but I'm not sure if there are no others at all.
Incorrect w&b can affect a lot of things. From longer ground roll during landing, to wrong brake settings, to worse handling of the aircraft and increased stall speeds. Under normal circumstances it should not be a problem due to huge safety margins, but if other things go wrong it starts adding up. One more hole in the swiss cheese model.
i assume it would be within bounds during “normal” atmospheric conditions. In the air with the wrong data and extreme conditions would be where it gets dicey?