He does not think that he's a "professional chef". On the contrary, he is making it clear that he is learning a new skill. This is about the journey of life and growth -- even when you are old. Well, ok, I'm probably older than him, but that's the point. This is the flip side of "social media". On the one hand he is an expert at photography and passes on what he knows. On the other hand, he is not a "chef" at all, but is bringing us along on the new journey.
I did not grow up eating lamb. My father almost banned it from the house. He
did grow up partly on a farm and he hated lamb because it was smelly. I guess he did not learn that you hang it outside to "cure". My mother started to cook lamb chops "for a change", I think, when I was around 18. My dad was surprised that it didn't stink. Personally, I liked it well enough, especially with mint jelly, but I didn't think it was wonderful. When I was in my 20's I found a place that sold shawarma made with lamb cuts, which is apparently common in the middle east. Mainly, in Toronto, shawarma is pork or chicken, which I guess is "fake westernized shawarma". That was really good. Then later when I was around 45ish, I found "lamb shanks" long cooked in a tomato sauce, and I really enjoyed that. But no matter what, I still would say that any kind of lamb is a novelty for me.
And then there was Matt's characteristic honesty. He overcooked it. He didn't pull any punches about that. He's still a photographer and not a cook. He did make it look nice when he plated it.
