Which isn't catching the wrist. It is doing a bunch of other stuff first.
No. That is catching the wrist. That other stuff is stuff you do to make catching the wrist work. People just don't say all of that in every post because it would waste too much damn time.
When I'm teaching a roundhouse kick, I'll usually spend just 10 seconds explaining it to my class. Sometimes we go more in depth, but it takes 10 seconds for me to describe the basic motion. If I wanted to get more detail into the proper mechanics, I could cover it in around 30 seconds to a minute. Ginger Ninja Trickster (my favorite kicking tutorials on youtube) has a 9 minute video on the kick, and his videos are fairly concise (he doesn't ramble on). However, in that video, he barely scratches the surface of what you can do with a roundhouse kick. That's just the basic kick, without much in the way of footwork, combinations, or including fancier versions like jumping kicks and turning kicks (which are very common in TKD). I could easily do an entire class just on roundhouse kicks and not even come close to imparting all of my knowledge on the kick and how it's done.
There's no way in every discussion on a roundhouse kick, that I'm going to be able to say everything there is to know about it. If I were to go into a dissertation on everything I know about the roundhouse kick in every thread where it's mentioned (just so someone as crazy as you will trust that I know what I'm talking about), it would take me hours to write every post, I'd probably find the word limit on the site, and nobody would bother reading it because 99.9999% of the post would be off-topic to the discussion.
People don't include everything they know about a technique when they talk about it. To think that just because something was omitted from the text, that it means the person doesn't know it, is one of the biggest leaps of logic I've ever seen you make. That "bunch of other stuff" is part of the technique. We just don't say all that other stuff every time, because most people are capable of understanding that.