The pilot reported that he saw the helicopter and decided to land long to maintain separation.
Also, adding power and pitching up to land long would increase AOA and put them in a situation where there's less control. It's one thing if you adjust the approach path to get onto the same approach angle, further down the runway, but if you just pitch up and add power...higher AOA. I'm a fan of pretty steep approaches in GA aircraft, but just "landing long" isn't going you get you around wake turbulence...that's 2D thinking.