I think a charitable interpretation is that given that the Rust code will be less forgiving, it will "break" C code and patterns that "used to work", albeit with latent UB or other nonobvious correctness issues. Now, obviously this is ultimately a good thing, and no developer worth their salt would seriously argue that latent bugs should stay latent, but as we've already seen, people have egos and aren't always exceedingly rational.

Well, thanks.

It's not exactly that the Rust implementation will be less forgiving. But developers will have a clear picture of the operations semantics, while C developers will have a harder time understanding the operations, and consequently avoid them.