I assume by "your comment", you mean mine. If so, it does not imply that that was the rationale - in fact, by calling it an excuse, and not a rationale, it implies the opposite - that the real reason is different, and storage space just a (possible) cover.
Because once you remove the storage space excuse, all that remains (besides doxing, copyright, and various legal reasons, which Deletionpedia shows are a small minority of all deleted articles) are various rationalizations on why readers should be kept in the dark.
I've read that, and their arguments are wanting. The most convincing is the doxing/legal reasons rationale. What is not convincing is using that rationale to hide the vast majority of articles that were not deleted for those reasons.
The other argument offered was "then what's the difference between a deleted and not deleted article", which is nonsense. By that logic, there is also no difference between deleting some text in an article, and leaving it in, since in both cases it is still accessible in revision history.
Finally there was the "would encourage trolls since their trolling would remain in history", but again, the same argument applies to revision history of non-deleted articles.
The articles that get any sort of discussion at all are the edge cases where a single patroller by themselves can't make up their mind. And due to the nature of being edge cases, they can indeed attract quite some discussion!
If an article is at all redeemable, it is (should be) kept and expanded instead.
[1] Normally you want to keep around a copy of "deleted" content in case someone wants to do some sort of check or audit, or might perhaps want to salvage some data that might still be useful. In certain extreme situations like particularly egregious copyright violations, doxing or someone putting up CP or what-have-you, page history access can be denied to admins as well.
https://en.wikipedia.org/wiki/Wikipedia:Viewing_deleted_cont...
I'm sure it goes against their terms of service, but it would be really great for getting rid of censorship.
That's the reason, I'm sure, even Deletionpedia has a removal process: https://deletionpedia.org/en/Deletionpedia.org:Removal_reque...