While it’s true that optimism requires diversification, you need to be careful not to diversify and protect yourself so much that you forget to take risks.
There’s a very thin line between building optionality so that you can then pursue an ambitious path and building optionality as a way to shield yourself from the dangers of life, which ultimately means you’ll never accomplish anything disruptive.
At the end of the day, strategy requires focus, and keeping all your options open indefinitely is the exact opposite of that.