Unfortunately there are really bad problems for people that dive from even less than that. If your back touches the bottom of the pool or a rock, if you jump high and your back touches the surface first, if your neck suffers from the tension of the water, etc. you might suffer consequences, bad ones. It was there to break tension so it wouldn’t be like hitting concrete.
Guy: Does flips from 172 feet into a pool Judge: 4.5! (the judge is probably his girlfriend’s husband)