Why? That assumes that being alone with your own thoughts is somehow good for everyone. I've done it--it's not all it's cracked up to be, IMHO. I believe there's enough variation in the way people's brains are wired up that it's not really possible to say "this specific thing that works for me is also good for your own mood/well-being/thoughts".
I don't feel mentally stimulated by sitting around in nature or by meditating. It doesn't "clear my head" or make me look at my life in a new interesting perspective. It doesn't calm me in any meaningful way or anything like that. I mostly just feel annoyed that I'm not getting something accomplished, whether that "something" is actively creative or passively consumptive (as much as something passively consumptive can be "accomplished").
If that kind of thing works for you, that's great! I'm sure I take great mental pleasure from things you consider meaningless :-).
A common problem for people who can not be without stimuli is that they can not disassociate from their thoughts.
That means just looking at your thoughts or whatever other inner processes are going on and letting them pass by without getting attached to them.
This is what you train when you meditate and it does not come over night, but it gives you the ability to gain more control over yourself and quiet time or time you use to meditate becomes rather entertaining...
There are a lot of scientifically proven benefits for doing meditation as well.
Doing this is a lifestyle choice. There is nothing wrong if you enjoy drinking sugary soda drinks every day if that's you choice that's what it is.
I do meditation since several years and also studied the science related to it. This is meditation in a nutshell for me: https://www.youtube.com/watch?v=sspY43lxqhE
However, I don't think that's a bad thing. I don't know how their minds work, so I just assume that we think and process the world a little differently. Because of that, I try to be sensitive to their needs/desires, and they do the same for me.
It's not a statement of who's "better," just how each person is a little bit different (for me anyway).
Actually, I've had it pointed out that you'll see people crinkling bags, shuffling feet, coughing and clearing throats, and so on if you're in an otherwise silent room. I know that I'm guilty of it sometimes, and when I stay mindful and clamp down on it, I notice someone else picks up the slack.
I must say that this choice of words rather took me aback as well. The problem is, it's difficult to call someone breathtakingly arrogant (which was my first reaction) when they have so much to be arrogant about!
I'd love to see some more insight on this from pg.
Edit: It's since occurred to me that pg may have meant at that particular moment rather than lacking a train of thought in a general sense. If that's the case, my comment is unjustified - apologies.
That's plausible; however, the conscious brain is constantly thinking / wandering / conjecturing about the past and the future, so it's next to impossible to not have a train of thought while you're awake. (If you have years and years of training as a zen master, maybe; if not, not).
Therefore, saying that people don't have a train of thought at a specific point in time is a little like saying they don't have a brain.
The rest of the post from PG would tend to confirm this: "ordinary people can understand" (...) "what they don't grasp".
I'm not sure I understand what you're saying: are you saying that noisy people don't think (or are stupid)?
I'm a "quiet one" too, but I think noisy people are the opposite of "thinkless"; they appear to be afraid of their own mind and what it could tell them about the insignificance of the world in general and their life in particular (anyone's life).
What they want is distraction; they use noise as a lid over an even more tumultuous and noisy torrent of depressing thoughts.