Hadn't thought about this one previously ... "That if you were in two dimensions and you tried to eat something then maybe your body would split into two pieces since the whole path from mouth to anus would have to be disconnected, so be thankful you’re in three dimensions"

Another option is endo/exocytosis. No rule that says the path between ingress and egress has to be open all at once.

I can recommend this nonfiction book on the topic: https://archive.org/details/planiversecomput0000dewd

We are basically a donut.