I don't get what you're saying. It's not a knee-jerk reaction for one thing, it's a thought-out conclusion. They already maintain multiple codebases (server, browser extensions, mobile client...), they're big enough that it's not a bad idea, aren't they? And it does do more than display encrypted text, notably implementing auto-fill and eventually passkeys.

I also don't see this as a 'flex' in any way, just transparency and sharing their process and conclusions with the community.