I am a bit surprised that this article talks so much about actual PhD stuff than high level guidance. Maybe it has to do with the author's personal background/experience or field.

Something I didn't see in the article:

Depending on your field, it can be extremely hard to get tenure. Unless you are a genius and are seeing signs you are well on your way to getting professorship and tenure (publishing good and important papers, really good at communication, checking all the other boxes), you'd better consider an off-ramp as early as possible.

In some fields, 100 people compete for 1 open positions, and that's rough. Having been involved in such a hiring process, I know it's extremely challenging.

I was smart enough to realize I'd never be a good researcher relatively early during my PhD and started preparing for job interviews. Sadly, I see too many people still having unrealistic dreams about being a professor late in their PhD. They even do postdoc and do that for many years until they finally discover they are not hireable. Good news is that they often find an industry job quickly after switching.

I could see that clearly -- their research, originality, communication and understanding of the field is just not there, and one doesn't become a professor without being completely in control of the direction of their academic research.

But it's hard to tell people "you are just not good enough for this". In most situations, you'd be considered unsupportive. However, in this case, it's the best thing you can say to a struggling PhD/postdoc.

(Many professors are completely incapable of advising on students' career. They often find it surprising that a student wants to go into industry. They hold completely incorrect assumptions like a PhD student just goes into a management role as soon as they graduate. Rarely a professor tells you that you should not pursue tenure.)