Of course, it’s okay. Being able to say “I don’t know” is a sign of intelligence in itself.
A huge number of people form opinions based on very limited knowledge, but these opinions then become part of their identity, and they feel compelled to defend them tooth and nail. I think the middle ground here is the idea of “strong opinions, loosely held,” meaning you have an opinion, but you understand it’s based on the best knowledge available at the time. You leave room for new information and allow your opinion to evolve. In fact, most opinions probably should be like that. There are very few views I hold that I feel are almost guaranteed not to change.
The Dunning-Kruger effect plays a big role here. When someone gains a moderate amount of knowledge on a subject, they often feel like they have a good understanding of it. But as they keep learning, they realize just how little they actually know. Uninformed people, by contrast, don’t know what they don’t know. These are the ones who write comments on social media pretending they’ve solved complex issues with simplistic solutions like “just do X,” while completely ignoring all the nuance. When you then try to introduce that nuance, they dig their heels in, taking it as a personal attack rather than a critique of their idea. This happens because they didn’t leave room for new information - they locked in their opinion, made it part of their identity, and threw away the key.
10 year old me didn’t have much expectations about the future but I’d say 15 year old me would be most surprised about the fact that I have a girlfriend. If you were to then tell me that not only do I have a girlfriend but I also have a house and the truck I’ve always wanted it would literally blow his mind.