An argument that you can put forward is that the law cannot be objective and functional when it is hindered by moral doctrines... morals govern on the basis of values, emotions, etc rather than a process from which the law can remain fair and impartial as it preaches... its failure to be objective would make law ineffective... however, you can argue that morals provide a human element to law... the element being, an understanding on how we should treat one an other which is based on values, emotions, etc
The paradoxes are unavoidable... dont bother avoiding them... just get something down... honestly, there is no real right or wrong answer... unless you write something completely absurd... eg: try to fill word count with the fresh prince of bel air theme lyrics