You can’t win the “no bad language” argument on Biblical grounds. Sorry. And yes, if you are afraid of the “potty words”, you are an infant, or at least an infantile mind.
Can you prove it by the bible?
I am not “afraid of potty words.” I fear God, whose authority is behind the plenarily inspired biblical admonition “Let no corrupt communication come from your mouth.”
If you cannot present your thoughts, even with force, without using "potty words" or profanity, then some vocabulary enrichment is definitely needed.