dveykus613,
Firstly, thank you much for the very kind words. If this is indeed the extent of your disagreement, we are not only on the same page (and line), but in fact on the very same word! You are a member of what the Gipper (a/k/a the Great Communicator, Ronaldus Magnus) would call the silent majority. I am glad too you found one slight area you may disagree with, otherwise Ed Koch would have us see a shrink for agreeing with each other all the time. 🙂
But to the point. You asked if this is applicable to all Torah She’baal Peh, and the answer is yes. In fact there are even limitations of Torah She’bicsav. You ask for the source. There are many. But its in fact a bfeirush SHULCHAN ORACH (Yoreh Deah siman 246 sif 6.)
This is a long thread and it seems you just came across it. I dealt with your question previously at greater length, with a reposting of a commenter’s post from a previous thread. You can read it here: