significant investment to ensure Android remains open.

Unless you want to install apps not from the google app store. Or develop apps not for the google app store. Or use a Captcha without having google services. Or use your bank website without google services. or use the internet without chrome. or... shit, sorry, I don't have time to list all the ways google wants the exact opposite of anything anywhere remaining "open" unless by "open" they mean "open to google's exploitation".