No it's not good enough to learn the best. You have to learn the worst too. I think you can actually learn more from the mistakes of others rather than the successes of others. Oscar Wilde said "Experience is merely the name men give to their mistakes".
Success in whatever you are trying to do is open-ended. There are many ways to get there. But there are even more ways to set yourself up for failure before you get out of the gate. You have to get rid of the road blocks. You have to clear away the rubble first. And one of the ways to do that is by considering the mistakes of others.
The hard part is taking all that you learn, and tailoring it to your own personality, strengths and weaknesses. If you try a cut-and-paste it won't work.