The difference between precise results and imprecise results is entirely down to skills, and nothing to do with tools
Mike, for the first time ever, I gently beg to partialy disagree.
I must have taught in excess of 6000 different boys in my career. In lab work, you needed a tool - or a technique - suited to the job in order to achieve precision (meaningful, i.e. accurate ) results. In my case, measuring the length of a microscopic object without a) an eyepiece graticule and b) a stage micrometer, would have been impossible. So, precision tool(s) needed.
Your point, I think, is that the same tool(s) used inappropriately, ham-fistedly, without due care and attention, renders false data? I fully concur. Once the tool is available, it's only as good as its operator. I can think of several hundred whingers over the years who couldn't be bothered to 'follow instruction'and ballsed-up what should have been a simple and edifying prac.
Perversely, I also believe tools of limited precision, like my grande olde wudden smoother, need FAR more experience, control and foresight in setting up than, say, my Record T5 and in that respect, I agree with you. BUT...if a more precisely controllable tool (like my Record) is used, setting the iron precisely is more easily and predictably achieved. The quality of the subsequent act of planeing is indeed commensurate to the care taken in its use.
Pedantry over.
Sam.
PS edit: I'm trying hard not to start a 'flame war'debating the difference between "accurate" and "precise"...the ghosts of too many school inspectors 'hobby horses' in that one!! :?