[arch-general] Severity of Failed checksum for PKGBUILD

Salutations, After trying to build the mpv-0.8.0-1 and finding that the PKGBUILD's checksum was incorrect, I filed a bug report. See <https://bugs.archlinux.org/task/43882?project=5&cat%5B0%5D=33&string=mpv>. I filed it under "critical" since an incorrect checksum means that the package was built from source that doesn't match upstream's source. I was told it's not a critical issue and it was downgraded to medium. I'm wondering why incorrect checksums aren't considered "critical". Regards, Mark