I think he means statistically and he's correct. however sharks are far and away the least thing one needs to be concerned with when entering the ocean. keep in mind that the ocean can be as deadly as any remote place on the planet sometimes even within sight of the shore.
look at all the people that take off in a boat for a pleasurable afternoon, go out completely unprepared (as in no radio no mobile phone no drinking water no working knowledge of the mechanical systems for their watercraft the list can go on ad nauseum) get themselves in trouble for a myriad of reasons and are helpless.
I grew up in a marine environment and I still enjoy the ocean and what it has to offer. I enter the ocean well prepared and with strong swimming abilities and occassionally still find myself in trouble.
the last episode. a friend and I went to spear fish off of hollywood beach when the yellowtail were schooling close to shore. we have an innertube type float with a net in the donut to keep first aid stuff, mobile phones two gallons of fresh water, energy bars etc. we have our dive flag on this. additionally we have a float and dive flag we take with us even though we seldom go beyond fifty feet from the tube. we still get boats go zipping by between us and the tube!!! anyway we are riding a strong northerly current, drift fishing the reef more or less laterally with the shoreline. suddenly there is an outgoing current we cannot swim against so we are pushed quite far out to sea, maybe a half mile or so. we drift with current still northernly but now fishing is out of the question as we are far from the reef and in blue water. we drift for about an hour and are finally able to kick in around LLoyd state park in the next town up, Dania, Florida. then I had to walk back to hollywood beach on A1A to get my truck to pick up our stuff. Interesting day. This occurred to two seasoned watermen right on the beach. tricksey tricksey mother ocean can be harsh. she was sweet to us that day.