[DGthe3]

They're trying to appeal to the widest possible audience. Most people do not care about a team of professionals spending a month doing a proper restoration or custom job. As authentic and as interesting to gearheads as that may be, its boring to everybody else.

So they go with shop work at a much more frantic pace, one that makes mistake (because that generates free drama), and likes to clown around. Or they bring in celebrities to make it that much easier to draw people in who wouldn't otherwise watch a show about that kind of thing.