1. Luck does indeed play at big role in getting a break, the right roles, the right director, etc. A lot of people who could have become big stars don't. People know this and leap from there to the whole thing being pretty random.
2. It's often not obvious what makes a great actor that much greater than someone who is not quite so great. Film probably accentuates the differences. But even with mid- to top-level professional theater, the whole cast is probably pretty solid, but the stars really shine in hard to put your finger on it ways. In more "normal" professional roles, it's usually a lot easier to peg why someone is just better than someone else.
1. Luck does indeed play at big role in getting a break, the right roles, the right director, etc. A lot of people who could have become big stars don't. People know this and leap from there to the whole thing being pretty random.
2. It's often not obvious what makes a great actor that much greater than someone who is not quite so great. Film probably accentuates the differences. But even with mid- to top-level professional theater, the whole cast is probably pretty solid, but the stars really shine in hard to put your finger on it ways. In more "normal" professional roles, it's usually a lot easier to peg why someone is just better than someone else.