By that logic, buying a slow phone can also just be undone.
A perfect solution that works 100% is not the goal. Small influences that can help you change behavior can still be beneficial. Maybe they doom scroll 5% less because of this tweak? Still a positive change.
This isn't really true. If you have an AWS, you need a global god admin. That's the root user. As an IT guy, I have to store those creds somewhere. So I make the password super long and random, store it in lastpass, add 2fa, and add alerting for all logins. It's never used except in the super rare case we have to do something that requires the megagod level privs of the root account (like changing billing to a master account etc)