The original comment by PunchyHamster was about cost, i.e how AWS S3 base tier costs cannot be justified if you purchase your own SSD.
You shifted the conversation to redundancy and how AWS provides bells and whistles. You are consistent in your position, just not with me and not with PunchyHamster because we both are comparing costs by self hosting.
And for those of you who are willing to pay the premium and don't care about costs, like you, would obviously find AWS attractive.
For a startup like ours and many others, cost is everything. And spending a day or two for bitrot protection and having a couple of SSDs for redundancy and scalability is a no brainer.
You don't need big buildings for resilience. I suggest building things that require real scaling and resilience and you would know that it is about being distributed, having low cost, and owning your systems.
Your argument that it is expensive and tedious to maintain compared to AWS S3 is false. No it isn't.
Fear mongering only works against those who haven't built reliable systems. Building an S3 equivalent with cheap providers for redundancy or having one's own small resilient distributed hardware with staffing most often dwarfs the horribly insane premium paid for AWS S3 services.
But this is only if you want the redundancy which is a different topic altogether.
If all you want is a single replica, which was what PunchyHamster originally commented on, the base price of what AWS S3 provides, which does not include redundancy, makes even lesser sense compared to having your own SSD.