It doesn't "Suck" per se...they are incredible creatures, ridiculously strong and the jumps defy gravity. It is hard to comprehend a fish that heavy getting that high above the surface. Alpinetrout landed a massive one ON FLY several years ago, he's got a great story to tell. I just don't like my boat tied up for long stretches of time on fish we aren't going to keep when there are so many better species to catch that fight well and are delicious on the table. Sharks are important to the ecosystem and I'd never kill one. But we've had some close encounters with tiger sharks right at the boat that were sorta freaky. We've had them bite fish in half and circle the boat, follow the boat, stalk the boat....it can get interesting.
I've had several encounters with sharks while wade fishing flats myself. Including a 10-11 foot tiger that came out of deeper water right at me while I was fishing in waist deep water. I backed up QUICK to get shallower STAT. By buddy Nate had a 14 footer come up no more than 25 feet away when we were fly fishing. My last encounter was a 6 foot blacktip reef shark that came right at me in knee deep water. I had to jab it in the head with the butt of my fly rod and it did a quick U turn and took off. Freaky. I needed a beer after that. Shit happens in the ocean. These are the things that make fishing interesting.....but you gotta be aware and don't do dumb things. Like sticking around when sharks are actively feeding.
I was snorkeling in the great Blue Hole in Belize ten years ago and that thing is FULL of sharks. Bulls, reef sharks, galapagos sharks etc. That is a very sobering, yet amazing, experience.