The only advice is to not sweat over things you don't do. Do you suggest one should?
As a business owner, it resonates with me.
To be fair, all startup advice is completely random advice. Really, there's no guaranteed rulebook for success, so everything should be taken with a grain of salt.
So for example "we just used Heroku" might stick in the craw of developers who think AWS Lambda based microservices are the future, but for a small startup with limited resources and time Heroku is probably a safe bet.
You need to stop focusing on all the things you’re doing incorrectly and focus on the things you’re doing well that are working for you.
If you take any of the items they said they didn’t do as a recommendation to not do that thing then you’re missing the author’s point.