On a couple of recent holidays to sunny places I have been amused by people with large expensive SLR cameras using flash to take scenic photos in bright sunlight. (I do know about fill-in flash!)
A recent example was someone on a coach tour using a long lens and a large accessory flash gun to take photos through the coach window on the opposite side to where he was sitting!
Of course many will still come out despite the flash, but most cameras will select a particular shutter speed when flash is deployed which may not be the best for the circumstance where flash is not the main illumination.
Personally, I wouldn't even take a decent camera to a beach location for fear of sand damage - I leave it at home as it is one less thing to worry about. My pocket compact is adequate for the usual snaps taken on holiday.