One of the tricky things going on here is that it can be very difficult to tell if a professional trades person is doing their job correctly, perhaps in a way you are unfamiliar with, or if they are making some major mistake (usually because of bad communication, though sometimes because of cutting too many corners or plain old mistakes). They are professionals hired to do a job because they are trained to do it correctly. It isn't usually a good idea to question their professional judgement, for example by demanding mesh when it isn't appropriate. Often you can get the same effect by asking questions, what is the rebar for, would it last longer with wire mesh or is the new fiber approach better, and so on. Though that can cause problems as well if you ask too many questions since they aren't paid to teach you how to do their job.
