Comment by F7F7F7

Google would sooner turn off the feature than build some convoluted solution to protect a custom brand font. It's a problem that's not worth solving.

I can just as easily download them from any of the brand's official websites. The vast majority are being utilized via font-face and are rendering inside of heading and body text.

Convenient WOFF format, all weights, and available in 2 clicks in Dev Tools. And if Dev Tools is too difficult there are dozens of free extensions that will do it for you.

I'd argue that what little Google provides now is more secure than the official websites' usage.