Yeah. You need to be truly skilled in every area to get to the top of modern mma. There are very few true specialists left and Khabib would be one of them. Even then, he showed his striking wasn’t too shoddy.
The skill levels are exponentially better every year. MMA gyms are popping up everywhere and we are seeing the new breed of complete mixed martial artists come through, like Zabit Magomedshapirov.