I feel like in the time I take to open an app, find a QR code, and they open the camera and scan it, I'd have just told them the 10 digit phonr number and been done with it
1. People spell my name right. Even when I tell people how to spell my name exactly, they still get it wrong. If they scan my QR code, they always get it right
2. I can put all my info in one place. My vCard has my phone number, several emails, links to my social media, Discord, and whatnot.
3. You can include a photo, if you don't mind making the QR code much larger. With a well optimized image, this can be a nice addition.