So flux is 'a crutch for people who don't know how to solder', because that knowledge would lead you to use 'expensive' flux-cored solder instead of 'shitty solder' plus flux?
I really don't think either's wrong, and anyway I assume 'production engineering' is not using how-to-solder tutorials.
I really don't think either's wrong, and anyway I assume 'production engineering' is not using how-to-solder tutorials.