Argument is a function of print, but here we are writing and reading electronic text.
And electronic text is more suited to conversation than argument.
Of course there is the Catholic tradition of Apologetics based on print and evidence and reason and argument.
But there is no need to apologise to me, mate. I'm here for electronic conversation. I left Catholic Apologetics a long time ago.
The invention of the printing press in 1440 gave birth to Catholic Apologetics and the invention of the telephone gave birth to conversation.
So - no need to apologise - there is no need to justify your existence, just get on the blower and have a word with me.