Yes, you are right, the replication is not a backup ;) , actually i backup database daily at 3:00 am but if database crash, the amount of data is big! that is the reason i want to replicate to reduce the data loss. By the way a few days ago a job partner did a delete with no where.
please keep in mind, replication is not a backup. All logical errors on the master (delete from table and forgot the where-condition) will replicated to the standby.