The title the author chose does a bit of injustice to the contents of the post.

The post uses a lot of words to describe an understanding that experienced engineers and managers should have. Technical debt is a trade off. It exists in nearly all software of decent size as it's being developed. It is vital both for management and engineers alike to keep it at a reasonable amount, or you'll wake up one day with something that can't release new features, function, scale or be maintained.

It is also worth stating that tech debt can have little to no siginifcance to the success of a startup.