It seems SE travel has it's own non-SE regulations and the asker has to justify him/herself to the rest of the users including his motives in asking the question, so I was wondering if it's against the site spiritual rituals to ask questions about a place where you actually live and very familiar with?
It seems SE travel has it's own non-SE regulations and the asker has to justify him/herself to the rest of the users including his motives in asking the question
Travel SE does not have it's own non-SE regulations. Travel.SE has it's own regulations, like all other SE sites. In addition. Travel.SE abides to the general SE regulations. If you feel that this is not the case, if you think that the rules have been breached, you should bring the issue up with the moderating team by using the appropriate flagging mechanisms. This (no so) thinly-veiled passive aggressive comment in a Meta post serves absolutely no purpose, except annoying community users.
Having said this, if the question is on-topic as per SE and Travel.SE rules then it can be asked on the website. What do the rules say? There are topics you can ask about. There are also types of questions you should avoid asking.
IMHO, travel-related questions about where you live(d), answered with your own personal knowledge or not, can be asked, and answered, on Travel.SE provided they respect the afore-mentioned rules.
It's absolutely okay to ask such questions. In my opinion, it is not against the rules to ask a question to which you know the answer, I even find it a desirable contribution to the site.
Travel.SE is a place to learn more about travelling and places one might not know, so I find it perfectly acceptable, even desirable that a local would contribute questions (even if they know the answer, they may even answer their own question) and knowledge to this site. I don't know what gave you this impression, but it seems mistaken to me. Happy contributing!
I agree that questions about where you live can certainly be on topic, and answering your own question can be helpful in this situation. Local knowledge is what makes this site particularly useful, and it's great when someone posts as an answer "I just went and checked, and here's what I saw."
The guidelines tell us: "You should only ask practical, answerable questions based on actual problems that you face." Historically, Stack Exchange sites have been a little more loose than that; questions a hypothetical person may face are fine and are actually useful when constructing canonical questions or setting up a self-answer.
That said, the hypothetical person asking the question should be a reasonable traveler asking about travel. I don't think it's unreasonable to expect that questions about the place where you live, like all questions on this site, should be reasonably related to travel. This goes along with the broader theme of asking questions that are "relevant to others," not intended as a rant or to start a discussion, and more than just "mindless social fun." When questions get away from "actual problems that you face" territory, it's easier for them to veer off-topic and you're more likely to see a negative reaction from the community.
As an example, Gayot Fow authored this excellent question and answer about bank statements for a UK visa. We all know that he's not actually applying for a UK visa and doesn't personally have this question. But it's a great question because we know it (and more importantly, the extensive answer that went with it) is useful to the many people who are interested in the topic. In contrast, a hypothetical question that is less grounded in an actual problem people routinely have probably won't go over so well.
If your question could reasonably help someone engaging in the sorts of activities broadly typical of a traveler to your area, then I'd go for it. If your question seems like it could be intended to provoke a reaction out of people or to address a problem nobody really has, then I'd skip it.