They are good suggestions for someone who has gained basic firearms proficiency but will lead to poor habits in those who are untrained. You don't take a guy off the streets with no training and put him in the boxing ring with a semi pro boxer for a sparing match on the first day. A few people might do ok but for the most part people need to work up to it.You have to admit that a 270 or a 30-06 are good recommendations. And with some practice and good form they are not at all hard to shoot.
Jay