Got it—you want to expand that into a more detailed version.
Here are a few ways you could say it, depending on tone:
1. Simple clarification
Most people do this the wrong way, so I’m really glad I came across this—it clears up a common mistake.
2. More engaging / social media style
A lot of people get this wrong without even realizing it. I’m really glad I saw this because it finally explains the correct way.
3. Slightly stronger emphasis
This is something most people tend to do incorrectly, so I’m honestly glad I found this—it helps correct a very common misunderstanding.
4. Curious / reflective tone
I used to think most people were doing this correctly, but it turns out many aren’t. I’m glad I saw this—it really changed my perspective.
If you tell me what “this” is about, I can tailor it much more precisely.