I find, I make less mistakes sawing by hand.
and far more when too much going on at once ie showing someone how to do it, and it goes embarrassingly wrong.
After 50 years on and off, I now try to minimise machine work, just do the major prep of the timber and if there are lots of similar sized things to do on mass, then the machine is good. BUT for one or two offs, I find hand tools give are quicker and end up being more accurate (surprising really) and a lot more satisfying. My lads love learning the hand way, and where its important draw plans and mark up. But where its a quick job just do it and take mistakes on the chin. The great thing about woodworking is that we learn something new every day.