thenick_ttu wrote:I don't think OP understands what No Worries and No Problem means.
If I say No Worries to you, I'm not telling you not to worry. I'm saying that I'm not going to worry about it.
When someone responds with No Problem when you say Thank You, they are basically saying "what I did was such a small thing that you don't even need to say thank you. It was no problem for me to do that."
Seriously in all generations people have come up with new and different ways of saying things, especially the boring and semi-obligatory sayings in daily speech.
When the telephone first became available to many people, it was common to answer an incoming call with “are you there?”. That was pretty silly if you gave it more than a passing thought. Why would your phone be ringing if no one was there?
I close with my favorite “Have a good day”
MY thought “no one is going to tell me what kind of day to have”. 