Perfect is the enemy of the good. While there's an ideal case where you're hosting it on a box in your house, that's not for everybody. So while hosting it on AWS doesn't remove every dependency on big tech, at least it's not a full on Google hosted SaaS product.
I think "perfect is the enemy of good" is actually an argument against AWS integration. Using S3 as a backend is a lot more complex than using local storage so it would take a lot more time to implement, that's why local storage is good enough