To play devil's advocate against my own argument: The nearest ship was about 5 km away, which is a decently long boat ride. In choppy waters with a small boat that could be less than ideal for someone who may be injured, weak from an extended stay in microgravity, etc. I assume the plan -- written months or years before the landing -- also had to factor in the possibility that the ships wouldn't have been so close. They did mention several times that the landing was unusually accurate, so it is entirely possible that their pre-planned helicopter ride would have made a lot more sense if they were, say, 20+ km away instead. You don't want dozens of people improvising the procedure in the middle of choppy waters with bad comms, so the best thing to do is to just follow the plan, even if it looks a bit absurd on camera.