If I understand you correctly, it's because it's less confusing to do it that way. The comments probably refers to that word in some way, and that's why it was changed. If it would just be replaced by the new word, the comments wouldn't make sense to new readers, and so on.
I think also if they're making corrections or updates they keep whatever was written initially and strike it out. I guess that way is more honest in a way, as they reported a certain fact, then corrected it without "sweeping it under the rug".
The other reason is for a comedic aside, so the real thought are "strike thru"-d, whereas the official reason is then subsequently written. Bit difficult to give an example here as no strike thru text modifier.
The other reason is for a comedic aside, so the real thought are "strike thru"-d, whereas the official reason is then subsequently written. Bit difficult to give an example here as no strike thru text modifier.