Here's the better course of conversation, what are YOU doing about it if you arent required by work to use Mail? What solution/app are you using then.
And do you feel a 3rd party app, not the Gmail app for Gmail (1st party apps) is a bigger or lesser security hole than this issue
Bashing on/arguing about Apple employees is getting nowhere, no one has any idea who is to blame (could be multiple people or teams, and Apple doesn't really care what anyone here thinks of them.
ProtonMail. I am thinking about going back to Lavabit.
I have slowly moved all my important stuff off of GMail and others. Eventually I will close all but 1 account. That is my original Gmail beta account from way back in the day 🤪 and maybe one account to use for signup type crap.