I’ve had a few failed and a few successful ventures. Every time I have failed, it was due to tunnel vision caused by a poor work life balance.
Now I hardly work at all, but am far more successful than I was while working 80 hour weeks. Making sure to be well rested keeps my mind clear and I make substantially better choices as a result.
Keeping time available to experience the real world outside of my immediate existence is tremendously beneficial. When I am on no artificial clock, I can experience how other people live their lives at their own pace, and what you can learn from them is often surprising.