The hotel, if they offer swimming pool facilities, have a duty of care for the safety and wellbeing of those who use the swimming pool. If they chose a design that, it was a foolish one and looking at the photograph (which is quite blurred) it seems that there is a no diving sign but I couldn't make out if there was advice on where the deep end is - if you are walking in the water, it would come as a heck of a shock to feel the floor fall away to form the deep part.
You don't have to be a non-swimmer to fall foul of the unexpected in a swimming pool. Before my thigh injury, I used to swim 50 - 80 lengths, four days a week; I once had cramp affect my calf and foot whilst swimming. As I was a strong swimmer, I tended to swim in the middle of the pool to leave the sides free for those who were not so comfortable in the water. Had I not been a strong swimmer, I think I would have experienced difficulty getting out (I had never had cramp but boy did it hurt).
Where people's lives are concerned, it is better to err on the side of caution. The hotel should have closed the pool until the CCTV was working again.