I chose Grub because I assume that for the other choices, you’d only make use of what the island has. I’m super picky about food, don’t like certain textures. I’ll be fine with learning how to make little huts (Gear) and going on walks and enjoying the gorgeous scenery (Fun), but I’d rather have my pizza and donuts!
You can open a can with a rock in a pinch. The problem with gear is you have only a few days to figure out how and where to get food with your tools before you starve. Fishing is not as easy as video games, especially with no grub to use as bait.