When this code was added 12 years ago in https://github.com/WebKit/WebKit/commit/df8d39165ed615be913a454c22d718265c5be483, it included the titleUIElement in the AccessibilityText entry, presumably so that it could extract the text from the element when necessary. However, the field that stored the titleUIElement in AccessibilityText has since been removed, so this no longer makes sense.
<rdar://problem/126725780>
Created attachment 470997 [details] Patch
Committed 277739@main (6168be34e9ea): <https://commits.webkit.org/277739@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 470997 [details].