Much of the problem in the things you mention is that those things are specific solutions that have been confused with goals. I.e., "we're supposed to build microservices" is a horrible idea, as opposed to "given this particular situation a microservice is a great fit".

Understanding the possible benefits and drawbacks of any solution is important. It's important in whether or not that solution is selected, but also to make sure that the implementation actually delivers those benefits.

It's very common in our industry to use "best practices" without understanding them, and therefore misapplying the solutions.