of course in my opinion as it is your opinion that you are expressing. That said I am well aware that not everyone is the same! (thankfully!)
Do you not see how that might be perceived as rude, miserbale or ignorant? Not everyone is the same as you as you point out. The ability to hold a conversation on topics "not of interest" is an important point of socialising and as a species we are a social animal. I would be a little peeved to be basically told to sod off while trying to pass the time having a conversation about the weather! How do you manage the old dears who always want a chat on the bus?
of course no one wants to converse with a droning Kevin who can only talk about some vastly obscure point of technical sillyness ( perhaps an area of interest to him) but having a conversation with someone on the bus about everyday nothingness is not the same and, to my mind, closing that out leads to a very insular and lonely life where the only people you are equipped to talk to are those with a similar area of interest as you.
You really do seem to find it hard to accept that not everyone wants to behave in the same way as yourself.
If *you* choose to disturb someone and start a conversation about "nothingness" (as you say), I don't think you have any right to be "peeved" if your chosen subject isn't interested. I certainly don't think it's rude, miserable or ignorant that the person might not want to partake, for any number of reasons. By all means start a conversation if you wish, but read the signals that the other person gives off and don't forcibly pursue it if the signals are that the other person doesn't buy in. Your pleasant interesting conversation about nothingness is someone else's potential "droning Kevin" - especially if they've got other things to do at the time.
I don't see how it follows that not always wanting to partake in a conversation about nothingness on a bus or at the end of a station platform automatically implies a socially awkward person who is lonely and insular. That's a massive assumption which seems to be based on a prejudice and dislike of people who simply don't behave exactly the same as you.
As for old dears on the bus, I haven't been on a bus since 1996, so not really an issue.
I would also add that a strained dynamic caused by a talkative person failing to read social signals can also prove dangerous in certain applications. For example, there are situations where people can legitimately ride in cabs with a train driver, indeed part of my job involves same. Where I am there is no rule that silence must be maintained in a cab, however there are provisions on distraction. The second person needs to be able to judge when conversation is appropriate (which can vary depending on whether the driver is used to company, or even how experienced the driver is), and likewise the driver may need to be assertive in stopping conversation at times when they need to concentrate. Some uninitiated people may consider the latter rude or ignorant. Reality is I have had to write more than a handful of action plans for incidents where something has gone wrong (eg SPAD or wrong side door release) and distraction has been cited as a cause, when the driver has been asked why they didn't stop the distraction they said they felt it was too rude to do so. Having the ability to judge when someone doesn't want to, or can't, converse with you is a very important social ability to have. It would apply when you're passenger in a car, as well as many other applications in life. I think you're utterly wrong to *assume* people are rude, ignorant or socially awkward just because they may not want to talk to you at that particular time. There are plenty of reasonable reasons for it, and I don't see why you should place someone in a situation where they feel they have to justify their actions to you.
If you don't like it - fine. Just move on, and realise that they are *different* to you. Not inferior, rude, ignorant, socially defective, sad, lonely or whatever other label you wish to apply relative to yourself - just *different* to you, and there may be very good reasons which you've failed to notice.