True enough. But the Calvinists deny that it was for the sins of the whole world and the Hyper Grace false teachers deny that after conversion Christians do not need to deal with their present sins as instructed in the Bible. Then there are those who claim that because all their sins were paid for they can live like the Devil. Then there are those who insist that the finished work of Christ was not really finished, or even if it was finished Christians need to add their works to the equation, or add water baptism to the equation, or circumcision, or something else such as all the sacraments. So unless all these errors are addressed at the same time, talking about the sin debt having been paid in full can be taken the wrong way.