Gotcha - bet you all had nightmares last night, haunted by knitting full of knots
Sadly these nightmares come true these days - commercial yarn ain't what it used to be
I don't often use commercial yarn, but currently I am doing so and found
three knots in a single 50gm ball of yarn

. Hence my using the felting method several times in one knitting session.
Rosemary, the point of using a method which doesn't leave loose ends is partly so you don't have to sew them all in when you've finished the knitting, and so the joins don't show.
In embroidery, knots are even more of a no-no - my granny taught me that when I was a small child (it was about the only thing she did teach me

) The back should be as neat as the front, and the same applies to knitting.