No, you're the one who wants to do that.
A republic is a res publica, a "thing of the people." We have to make sure that this particular thing expresses the values of the people we want to be. No society has ever existed without values.
Many libertarians seem to believe that having no values is the ultimate liberty, and want the society around them to reflect this. Is that what you want?
This is the religion forum, and that's a debate for politics and activism. I'll be happy to take it up with you there. If you want to take that argument into a debate on the Constitution and the Republic you're welcome to, and I'll be happy to oblige you. I'll tell you right now you'll get various pieces of your anatomy handed to you on a platter, rhetorically speaking.