I might get “cancelled” for this, but hear me out:
If you remove your account bad actors won’t be able to identify you unless they put in the effort. Reddit staff will revert popular comments and posts to the way they were before the Blackout. Mass-scrambling your posts and comments with a “f*ck Spez”, followed by a long chain of "A"s or whatever, annoys people who are just trying to find an answer to something on Reddit, and it doesn’t help anybody except the user’s feelings.
The preservation of information comes above some moral feeling.
Your opinion?
I doubt it will matter much in the long run, because as you point out, Reddit has shown they can restore those comments. It’s just extra work the commenter takes on for some short-term obfuscation.
As for preservation of information vs sense of morality, the right to be forgotten should be respected.