Not 100% true unless you re taling about the shame called AoS which i know nothing about. In warhammer all models are considered to have a hand weapon. So in theory it doesnt really matter whether you use the lance or the sword after the charge since you dont get any bonus. The lance can only be used on the charge so its the only time you get the charge bonus. Every phase after that uses normal strength untill you charge again.
So the tabletop doenst really compare to the game.... i think.