“Master” is very subjective. Are you looking to create Pixar quality animations, or are you looking to create animations that look great in a game. Both require skill, but depending on what your end goal is will determine if you feel you mastered a subject.
Yes you can master multiple disciplines, but I would instead focus on what YOUR end goal would be in order to feel like you’ve mastered these. Keep working at it until you get to that point. Lots of people specialize because they find it easier to focus on one subject and go deep with it. Others find it more enjoyable to combine multiple things together.
