What a strange sentence. Google can do a lot of things that nobody can do. The list of things that only Google, a handful of nation states, and a handful of Google-peers can do is probably even longer.
Sure, but running a fuzzer on ancient codecs isn't that special. I can't do it, but if I wanted to learn how, codecs would be a great place to start. (in fact, Google did some of their early fuzzing work in 2012-2014 on ffmpeg [1]) Media decoders have been the vector for how many zero interaction, high profile attacks lately? Media decoders were how many of the Macromedia Flash vulnerabilities? Codecs that haven't gotten any new media in decades but are enabled in default builds are a very good place to go looking for issues.
Google does have immense scale that makes some things easier. They can test and develop congestion control algorithms with world wide (ex-China) coverage. Only a handful of companies can do that; nation states probably can't. Google isn't all powerful either, they can't make Android updates really work even though it might be useful for them.
What a strange sentence. Google can do a lot of things that nobody can do. The list of things that only Google, a handful of nation states, and a handful of Google-peers can do is probably even longer.