It's subtle misinformation that's designed to change how people unconsciously perceive PWAs. When people bring up PWAs, they commonly refer to a particular set of APIs which has a tendency of mainly being a Google-driven effort. GP is muddying the waters by instead framing it as the HTML spec itself and implying it's official.
If this isn't a clear case of gaslighting, I don't know what is.
If this isn't a clear case of gaslighting, I don't know what is.