Not really, Silverback. While there are beginner routines that work for any healthy adult, they could also offer routines and training advice for people who are obese, have kyphosis, scoliosis, muscle imbalances caused by tennis or rowing, who are recovering from knee reconstructions, are elderly, who want to be better at football, who want to be better at volleyball, diabetics, people who are healthy adults but intermediates, who want to focus on their calves, and so on and so forth.
Personal trainers and strength and conditioning coaches don't simply give the person a cookie cutter routine and then count reps. They give information appropriate to each person's strengths, weaknesses and goals. That's information which could be in a strength and fitness magazine.
Of course, each article written must be paid for by the editors and takes time, whereas if the articles are written by the supplement producers, the supplement producers pay the editors to write the articles, and it takes the editors no time or trouble to deal with them. Add in a few recycled articles written a couple of years ago, fill in with adverts and there's your mag.
As we've seen with newspapers, proper professional writing is time-consuming and expensive. Bullsht with no experience, thought or research in it is quick and cheap.