Best way to tell if someone is inexperienced: they say not to carve. This is especially true when a bunch of people line up in a row for the opportunity to repeat each other. This lemming phenomenon is also often seen when people mention subdivide or 'make hollow'.
The only reason people don't use carve is because that is DOCTRINE. And like all doctrine, it is wrong.
For example, the reason Muslims don't eat pork is because they never learned to cook it at a high enough temperature to kill the parasites.
The reason mappers don't use carve is because they never learned to use it with brushes that have simple and complete intersections.
There is nothing wrong with the carve tool, it works EXACTLY as expected and is VERY useful if you know what to expect.
Some people will respond "oh don't use carve is just something we tell new people." Well, you should instead tell them "carve can SOMETIMES give weird results if you use it with weird shapes or shapes that don't fully intersect."
Others may reply "you should make your own brushes." This is usually stated by people that have made less than ten maps and think it is a point of pride that they have wasted many hours that could have been saved by cloning, hollowing, and carving.