I did say "probably" insulting. Normally, when people talk about manufacturing, they're thinking of a huge production line and semi-skilled labour.

I know work that's much more skilled gets counted as manufacturing, but it's a minority, and if I were doing work like that I'd say I "crafted" things rather than "manufactured" them, to make sure people realised this. (-8

Also, ironically, "hand-made" and "manufactured" seem to be very nearly antonyms now.