TL;DR: Yes... Yes it is. But our questions and answers are based on supported experience, so that we don't become a low-quality dustbin.
First off, Welcome!
You are right in that our site is basically a place for opinion-based questions. As it is, talking to people is just a subjective art. There's seldom any verifiable answer that will work for everyone. Then add the fact that each individual has their own experiences and views on the world around them, and you end up with a bit of a mess.
The issue then boils down to How can you turn a subjective topic to have as many objective posts as possible?
The answer? You enforce a specific quality standard.
The existence of a quality standard is absolutely vital to the health of the site. Subjective topics break the model a little bit - the community votes on answers that are supported with references, that are verifiably correct, and that work. With the topic of this site, our references are our experiences, we can't always tell if an answer will work, and we may not even know if it's appropriate for the situation the asker is facing.
So, we require that questions include all the information that is relevant to the situation. Where are you from? What cultures are the people in your situation a part of? Is it family? Friends? Acquaintances? What about faiths and languages? Liberal or conservative tendencies? Chances are, if you want to have a good question that will receive good answers, you need to include this information in the question. There has been opposition to including this, with arguments along the lines of "we have global norms!" and the "world is connected and nearly the same" which has been thoroughly debunked numerous times on the site. But so far, I would say we've been doing decently okay.
Next up is answers. For an answer to be high quality, you need to show why your answer will work for the situation that the asker is facing. Have you had this problem before? Are you equipped to answer this because you are familiar with the cultural norms of the situation? You can't say "Well, if this happened, I would do this."
Then the other issue is that people will often vote on answers that they plainly agree with, or that seem logical, not because they can say "I can vouch that this works!" This is a phenomenon that I've personally witnessed a few times on the site. Then a tendency to answer with "westernized" answers - which I don't blame people for, since our demographic undoubtedly leans to English-speaking countries. On the answers side of things, we still have a lot to work on.
But otherwise, to answer your basic question, we are a place for "opinion" based questions. It's just that they have to be supported.