Well, interestingly this change was reverted:
https://www.mediawiki.org/w/index.php?title=Technical_decision_making&diff=prev&oldid=6388659
So here we are. We all know that Google Docs can be useful, but I'm quite sure in Wikimedia we can avoid to both adopt and promote proprietary software in general. It's easy nowadays to share a Libre online collaborative document, since we have https://cryptpad.fr/ - Collabora - OnlyOffice - EtherPads - SandStorm - etc.; - and all of these are good software.
So I'm quite sure that we can easily at least stop having Google Docs as a requirement to be involved in such technical decisions. I don't think that any clarification is needed, but, in doubt, feel free to explore reasons in m:Wikimedians for software freedom.
I think everybody will generally agree with this. We know the situation, but we cannot ask Wikimedians to all become Google customer to be part of their Wikimedia movement.
Thanks for what we can do to mitigate and fix this situation.