Great post, totally agree that you need to diversify your income, you never know what injury is around the corner, or a setback that might mean you need to rely on your alternative incomes.
But its hard to make enough passively to live, without taking too much risk so herein lies the challenge.
Nothing comes our way easily. Equal efforts are required to reap a good income in our life. When there is an immediate need in our life, savings alone will not be able to help us. That is when we will need a passive income source or an alternative source that can compensate us.