This article is pretty confused. For example, the concluding section is titled "What to do instead?" but doesn't actually address that question. (If this were the only problem, I'd think it was an accidental leftover from an edit, but it's all only partially coherent.)

There are some good parts. It's not all wrong or anything. But I don't think it's worth the read.

Maybe a good takeaway is: consider which monitoring systems might accomplish your business purpose better.

Also, I guess: a full-featured logging subsystem in a distributed system can be substantial. True but not too interesting because that's pretty obvious, often not needed, wouldn't normally be implemented from scratch any more than a monitoring system might be, etc.