There is no easy way to confirm a QR code itself is correct, and indeed, there exists malware which can change QR codes and display malicious ones with different encoded addresses. If you do use a QR code to scan an address (or transaction, or anything else), it is good practice to manually check the address which is then displayed in your wallet as discussed above before hitting sign/broadcast/confirm/whatever.

I very much doubt any newbies are typing addresses by hand, and especially not "most" newbies. As nc50lc has explained, typing an address by hand is very unlikely to lead to loss of funds due to the checksum built in to bitcoin addresses. Base58Check addresses have a 4 byte checksum, meaning that a typo only has a 1 in 4,294,967,296 chance of creating an incorrect but still valid address. Bech32 checksums are slightly different, since they are designed to identify the errors rather than just through an invalid address, but also guarantee a failure rate of less than 1 in a billion.