Exactly. Weight distribution makes a big difference to how the bike handles. If you put a lot of weight on the back without balancing it with weight at the front you'll lose grip on the front wheel easily, which can be dangerous. Front wheel skids are almost impossible to control.
That would be a good example of something we call "user error". I am also not surprised that the first instinct of the risk-averse is "make it heavier", but look where that's got us with cars?
