Why do we use “Because Allah commanded it” as a shortcut in answers?

I want to start by saying, I think about faith and deep questions a lot, but I'm really not great at putting thoughts into words, so forgive me if this comes out messy. Lately I've been reflecting on the idea that if Allah has ordered us to do something, then it must be good and true. And if that's the case, shouldn't we be able to explain why something is right without immediately jumping to prove Allah's existence first? So when someone answers a question with just “Because Allah said so,” it feels like they're not really engaging with the question or trying to offer real reasoning. Even if we can't find the wisdom ourselves, but a sahih hadith shows it's a clear command, maybe it's better to say something like “We don't fully understand the reason yet.” Just telling someone “Because Allah said so” can sound like we're telling them to shut off their brain and accept things blindly without thinking about the deen. My main thought is that if Allah commands us something, there's always a wisdom and justification behind it. If we can't find that justification, then either the understanding we have is mistaken, or if it's authentically from the teachings, then it just means we haven't grasped the full reason yet. I'm not sure if saying this is wrong as a Muslim, but I believe that if Islam is the true faith, all its rules and teachings make sense and can be justified without having to first assume Allah exists. Just to clarify: When I say “if we can't find a justification it might be untrue,” I'm not saying Allah is wrong-astaghfirullah. I mean maybe we made a mistake in how we understood the teaching, or maybe we're dealing with a weak or fabricated hadith. Assalamu alaikum.