You're talking about a mythical shop which already has all the tools - very few shops have them all. Similarly, there are plenty of physical tools which are not

You're talking about a mythical shop which already has all the tools - very few shops have them all. Similarly, there are plenty of physical tools which are not obvious to use; my housemate tinkers in the shed with wood and he's got a variety of tools, some of which I'm nonplussed in how to use. Plenty of the tools are hidden, whether 'hidden' is defined as 'not present' or 'unclear usage'. Likewise methodology. As a carpenter you might wonder how to curve wood. You might even hear about steam being involved. But unless you're finding out from someone who's already done it, it's not that simple to just steam a bit of wood and usefully bend it from first principles. Hell, even just using a chisel for a novice is easier if you talk to someone first - especially a metalworking chisel.