Remember a standard saying about security? Something like “you are as secure as a price to break your security”. Same thing is said about privacy: “You are as private as a price to deanonymize you”. There are never perfect security of privacy, just prices. By editing posts we make it harder to deanonymize us, because it would require storing all edits, having a direct access to Amazon AWS as you said and/or possibly breaking their ToS and GDPR for information storage (in case the access to Amazon AWS is not real-time but delayed). It would require more resources to perform all those actions and hopefully more expensive, even if just a bit. (Not sure if it’s worth the time, but it’s everyone’s own decision what to do with their own time.)
The corresponding treat model includes defense from the three-letter agencies by legal means and making deanonymization a little more expensive. However, as @QubicRoot explained, it’s not just defense against someone. It’s also a feeling of being in power of your own online world, the feeling of ownership over your words. Isn’t is the same as following standard copyright laws which assume by default that everyone owns their creations (including texts)? I did not see anything in the Privacy Policy of Qubes Forums about removing the copyright from the owners and I hope it will never be implemented. By the way, the Privacy Policy of this forum does not really exist despite being definitely very important to the users. Please consider making it clear and up to date as soon as possible.
@QubicRoot Thank you very much for explaining what I feel and showing a different side of it. I really hope that all your posts will not be deleted, since you really contributed a lot to this forum. Would you consider giving some time to us and to moderators to think it through and make the final decision before doing what you are asking?