I'm going to guess that you've never written, and perhaps never read, any unsafe Rust, because you (in common with several Rust critics) seem to be imagining it like a switch you can turn on somehow to disable the safety rules, and that's not what it is at all.

This Odin feature flag just allows me to write what I meant in Odin, I can write it all out by hand using make and so on without the feature flag, but it's more annoying to spell that all out which presumably was the impetus for this feature flag in the first place. The flag didn't somehow "cause" the unsafety, that's an insane take.

Odin isn't very well documented, so as somebody who was writing Odin just to explain the problem here, the easier option avoids trying to guess which of a dozen undocumented functions with names that may be related to hash maps is the "right" function to do what I meant, I can just write what I meant and turn on the feature flag to acknowledge that it involved allocation.