If what you mean is, by taking a 'casual turn of phrase used for implicit emphasis and treating it as a formal argument' I'm creating little straw men, then that would be incorrect, because whether or not it's a formal debate does not matter to whether something is a bad argument.

If you mean the two are separate, then, to the first part (the formal argument), why does whether it's a formal argument matter to whether it's a valid argument?
To the second, how? If it's the use of examples, I have tried to spread them out into a few different positions to demonstrate.