True. But he didn’t use much of that grass field. He would not use the engine much on a normal approach and landing, so it would have felt familiar, but with no option of gunning the engine to abort the landing and go around for another try. And of course the worry that the grass might be a flat as it looked. But he kept it all together, so good job.
A close analogy might be having a blow-out on a motorway. Don’t slam on the brakes, signal to let others know what you are doing, and make for the side of the road. If you keep your head, and move gently it feels a lot like ordinary driving and the risks are low.