I believe the point being made is because Electron uses Chromium they are making an assumption that it has some of the characteristics and possibly tracibility of Chrome.
Not sure if that is or isn't true but I would say it is understandably a different type of worry from using Go or nodejs.
Electron is heavily dependent on code developed and maintained by Google, but then so is Node, and Go, and presumably anything written in Go, such as Docker. Calling all of those Google products seems wrong—but it's true that Node would be in big trouble if Google suddenly stopped maintaining Chrome or something.