

The US government doesn’t (to my knowledge at least) have copyright protections so MIT wouldn’t be possible. BSD 0-Clause is just better because e.g. Austria doesn’t allow you to cede copyright to the public domain and CC0 directly mentions the public domain in the terms of the license.
It would make sense that they don’t want to get sued following the recent controversy. Might also be aimed at undermining the AI slop (that Google doesn’t profit from)