I doubt a Gator would purposely try and tip over a canoe or kayak, I believe in this case, the person paddled over the Alligator and surprised it, when the Gator made a sudden movement, it tipped the boat over, the person fell in and started thrashing around, the Gator probably thought, game on, something is attacking and attacked back biting the person.
In the last 7-10 days in Florida, we’ve had a person killed by an Alligator and another person killed by a bear in South Florida near the everglades.
In Jacksonville where I live, we had a coyote attack a person out walking their dog, nobody was killed but the coyote was later caught and killed; after testing it was determined the coyote had rabies and everyone involved in the incident had to get rabies shots.
Florida man is facing stiff competition from Florida animal.