Don't deny, Ratify!!
The first reason why people should ratify the Consitution is becasue hee they recalled the weaknesses of the government under the Articles of Confederation.
Another reason is that the federalist showed how the Constitution would remedy those weaknesses by creating a stronger, more effective union of the states.
The Constitution whether or not its ratified.. the constitution contains the rights of the people or the bill of rights unlike the Articles of Confederation.