Error correction in QR codes may not necessarily mean easier scanning. The level of error correction and data density are two factors in tension. For fixed data, lower error correction allows for easier reading of QR codes, but only when there is minimal damage. Higher error correction becomes useful when there is damage, as it allows for more codes to be read. The size of the QR code modules determines the field of view required for scanning, and higher error correction allows for scanning from further away. However, higher error correction also leads to larger QR codes, which can affect data storage. In experiments, higher error correction levels showed more resilience to damage and allowed for easier scanning. Overall, the choice of error correction in QR codes can impact data volume and scanning ability.
https://huonw.github.io/blog/2021/09/qr-error-correction/