World readable permissions in /netbackup/db/

Why we have World Readable and Writeable permissions on files inside ../netbackup/db/images/ and ../netbackup/db/snapshot/ especially .lck files?
It can be an argument that these are empty zero byte files and removed later but why we need them to be rw-rw-rw whereas rw-rw--- can serve the purpose?
Can we change them to comply with enterprise data security standards and how?