I went to a saddle school in New Mexico. One of those "build your own" things. I was pretty up front with the guy on two counts: 1., that I'd been building saddles and wanted to get better primarily to sell them, and 2., that the wife and I were looking for land in that general area. Thus, it didn't take a rocket scientist to figure out that I was some day aiming to be his competitor.
Over the course of the week, my teacher told me how his father and grandfather had almost never told him how to do something, until they'd watched him struggle with it for hours on end, just to show him the correct (and often easy) way of accomplishing his task. I said that'd probably tick me off so bad I'd quit and raise hogs. He laughed and said "That's why I went in the military." Fortunately (especially for me), he came back, and continued his education at his family's shop.
Now of course, I was paying this gentleman and not apprenticing, per se. But he was straight up about everything in the business, how he did whatever I wanted to know, prices, ups and downs, etc. He taught me more in the couple weeks I was there than I'd learned decades of self taught learning or observing from others. Even after he knew I'd bought land just down the road from him, and could some day be a competitor (not likely, 'less the Lord blesses me with a lot more talent).
There's a lot to be said for being quiet and learning with your eyes and your experience. There's also a lot to be said for a darn good teacher, in any subject. I think some folks can't (or think they can't) teach by explaining, and prefer you to just watch. Some others teach just fine.