There's bad advice, and there's dangerous advice. This guy falls under the latter. There is one guy on Boobtube who has an entertaining video on casting hollowpoint bullets, he casts them from wheelweights, then drops them in water to cool them so he can load right away. I wonder if that guy ever tried an expansion test on his shiny cast bullets.
that's just it.
you have a reason for doing what you do.
quite often others have a reason too, but they don't follow through to the end of the thought chain.
Or reaffix heads from separated cases......