This is helpful, but it could become stressful because the person needs to input each alphabet and letter individually. It won't be practical for multiple or bulk sending. In my opinion, it's better to compile all addresses in a spreadsheet. Then, whenever you want to send, you can simply go there, copy, cross-check, and send without having to type all the time.
I think inputting the letters manually is not also advisable because you can make errors while inputting the address.
The use of QR Code is probably the best way to get the right address without too much error or been affected by malware; but using copy and paste method is also good and common among us, you just need to be very careful and double check the address you copy and pasted before processing the transaction to avoid sending bitcoin to a scammer address that might have been in your device due to malware virus.
Always make sure your device is clean and free from viruses of any kind.