Let's forget how it is used or what it might imply , because why , is why? (?) Regardless am I not correct." Why, thank you" makes little sense to use unless you are asking why someone is thanking you. let's keep it real , I don't think there is another language that uses such , so commonly.It is not correct....it makes no sense. Am i the only one here that feels this way?
The word Why has multiple meanings. Specifically Why is being used as an interjection in this case. While you are probably interpreting it as an adverb.