It's also common and natural.
I've never met the man who said that-who had a clue. In fact everyone every, single, one acknowledged they were dealing with something unknown to them. In and of itself-it proves you don't understand internal skills so you relegate them to what you see. You should go meet someone who instead of saying they got it-actually does.
FWIW Your fights don't prove anything other than you fought some people who fought back. Fighting is fighting. The best fighters in the world can be the best fighters in the world. and they don't have a clue about these skills either.
Good luck with your training.