No excuse whatsoever for landing at the wrong airport. Errors such as this happen when there is breakdown of SOPs and CRM. I've never seen an FCOM that had a statemen to the effect that if a visual approach is to be accomplished then naviads when available shall be tuned and identified as a backup and confirmation. I remember years back a CAL with an FMS landed at the wrong airport at Corpus Christi in CAVOK conditions.
Oh, you pompous Alphabet Soup with all your FMSes and CAVOKs...Try an SPO into ACS AN and then STFU.