The rear tire is quite sticky, but also you don't even have full power/torque unless you set the throttle mapping to sport (which is default for sport mode but not the other modes). You can also configure the traction control to kick in sooner, if you're concerned. Also, the bike weighs more, so more pressure on the tire, which means better grip on average compared to lighter bikes. Frankly, the Rocket 3's torque is significantly but not drastically higher than the Harley-Davidson VVT 121's (163 vs. 139 lb.-ft. peak, or 17% greater).
I had a ZX-14R and it was far less forgiving. Don't forget that engine torque isn't what matters, it's the rear-wheel torque that does.