Yanbu
But, whenever we go to SA to visit family, most pools are unfenced. Only my mum's are. There being lots of adults around isn't a guarantee of safety either, a back door is left open, someone thinks someone else is watching, etc.
Also, people think if a child falls into a pool they will float. They don't. They sink to the bottom like a stone, kids like to run around too, if the fall in and bump their heads on the side of the pool they could be knocked unconscious.
I investigated all sorts of pool alarms before our last trip, eventually settled an a Pool Turtle. Got it ( from the states) on ebay the last time we went, and two of the same colour wristbands. Welcome to PM me if you want more info. It's pricey but it wasn't really negotiable. I was in SA for 6 weeks, 3 weeks at the house with the most dangerous pool iykwim, it is hard to be super vigilant for that length of time. Kids wore them on their wrist or ankle. We had one near miss when DS slipped next to the pool and fell in halfway, leg in and torso out. Pool alarm worked perfectly.
I got a lot of very sceptical looks, couldn't care less. Hth and enjoy planning your holiday!