I don't know if I agree with this. Basically, the argument is that you should borrow money before borrowing becomes difficult. The problem is that it isn't so easy. Heck, if we all knew that the stock market was going to slump in the summer/fall, we would have sold in the spring and bought back in. We didn't know. Most of the best investors didn't know. The chance that a start-up CEO will know is probably nil.
You aren't a financial genius as a tech CEO. Doesn't mean you aren't smart, but it isn't your field. You're just as likely (if not more) to be wrong than right. Even people who make their living this way were almost all wrong this time.
Live frugally, save money, and make plans for rainy days.