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I'm 40 and I've never scanned a qr code in my life. So yes, absolutely.
A lot of websites that offer 2FA will require that you scan a QR code. Are you just never using 2FA?
The only 2fa I've used sends an alphanumeric code that I type in.
Please don't ever scan a QR code! You have no idea, just like shortened URLs, where it will take you.
Or you could get a QR code reader that displays the URL before opening the browser.
What am I to do if I ever go to a restaurant that only has qr codes for menus?
Draw a few black dots in different spots around the qr code, hopefully you can make enough changes that it breaks the code, but isn't noticeable with the naked eye.