"Will such Advice Really Encourage Beginners ?" In many cases, yes, I believe it will. And those who won't be encouraged are probably sensible enough to ignore it.
Like many of the people on this thread, I started cycling long before the days of special clothing, helmets, energy drinks or other paraphernalia. I just did what kids of my age did. As I grew up, I cycled to university, then to work, then just for fun. Along the way I learned that decent bikes were nice to ride and easy to work on, that Lycra is comfortable and practical even for short rides, that clips are good and clipless even better. And I put up with all kinds of poor-quality gear, like those Ever Ready fork-mounted lights that exploded when you rode over a bump in the road.
Now it's a different world, and mostly a better one. Bikes are better and relatively cheaper. Modern lights are fantastic. There's a wonderful choice of excellent gear at a wide range of prices (and I'm a cheapskate).
So please let's not be curmudgeons. Of course all you need to start cycling is a bike, and I'm sure that's enough advice for many people. But a great many others are somewhat competitive, whether that's in terms of bikes, speed, miles or clothes.
Competition is not my bag at all, but let's recognise that the world has changed. Lots of people want to take their new hobby seriously, fancy gear and all. If that gets more people out on bikes, fine by me.