This is definitely true, and I have a lot of issues with Google and their lip service to open source. (People reading my history will attest, I'm sure.) But at the very least, Fuchsia will be a lot more secure by design than Android, and Android is the dominant OS platform on earth. The state we are right now, where 85% of mobile devices run Android, and 0.7% of them are actually up to date, is a terrifying place to be from a security standpoint.