It is occasionally good to have an offside roll, but often not critical in whitewater. If a hole is strong enough to prevent you from rolling, you can often just put your paddle in the flow and effectively let it roll you up. In squirrelly washout flows, a failed roll often spins the boat 90 to 180 degrees, so switching to the offside may actually put you on the wrong side to roll on a second attempt.
After a guy gets a good roll on one side, I really start pushing them to learn to brace well on both sides. A strong brace on both sides is much more important than a strong roll on both sides IMO. Having more than one type of roll is also often beneficial. A back deck roll, or even a front deck roll can often limit your exposure time.
Nothing wrong with getting an offside roll, but I'm not sure I've ever seen a situation where a strong paddlers couldn't recover without one.
Deck Rigging Gear
Hardshell Kayak Sail Rigs
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