Avoiding blunders only works at chess at the lowest levels. It's the same for tennis. Complete amateurs can win just by returning the ball but at higher amateur levels you will have a bad time if you try this.
P.S. I've never founded a company or have any experience with it.
Software isn't like that. It lives in the right tail of the distribution. You can blunder everything except product and still do extremely well, because software costs nothing to produce. Your gross margins are 95%. You can blunder left and right and it doesn't matter when people like your product and pay for it. Mistakes that would destroy any other low margin business you can shrug off.
A pizza place is a local business. They differentiate themselves from other pizza places by being closer to you.
Software is global. Your tiny startup competes with open source, big tech, and everything in between. If your product is mediocre you'll struggle or fail (and rightly so). If your product is great you get a fire hose that spews money.
In basically every interview with successful founders they joke about the giant mistakes they made (that ended up just not mattering). The kind of blunders that destroy any other business are no big deal in software. The article is wrong and the lesson should be the opposite.
"This observation applies only to amateur tennis. In professional tennis it’s just the opposite: 80% of the rallies are won rather than lost, as unforced errors are infrequent. This is true in chess as well, as high-level players don’t blunder, and thus it really is that litany of other skills that results in high standing."
Most startup companies are run by amateurs and that is advice for amateurs.
People who have experience already stuff that is in article ;)