My Dr said to NEVER EVER put filler in your Nose for Non Surgical Nose Job, is this true?

My dentist started to offer injections - he is a great Dr and has been studying it for over a year as passion - I do trust him, and he did a great job on my Botox. I do know he is new and this is not his first profession so am taking that into consideration. But he said there is a major vein there and that the filler can get stuck in between the tissue causing a permanent hump and blue color - he has seen it himself and said to never ever let anyone tell me it's OK to put filler in my nose?