Flashback, it gives potential travellers (who may be choosing an airline) a picture of how reliable particular routes or airlines tend to be be. For instance, QF's punctuality on its Australia to Japan routes is wonderful: the same could not be said of its London or to some extent its Los Angeles route. SQ's punctuality is among the best, and JQ's at times woeful, the latter even on the incredibly important SYD - MEL - SYD route.
On many routes there is competition so these pages allow passengers to compare and contrast: for instance, flying EK or CI across the Tasman may be a front of mind option or viewed as 'exotic' for first time international travellers (many of whom 'cut their teeth' on a Trans-Tasman trip) but without reference to these pages one might not become aware that generally speaking, the CI flights that come in from TPE have a better punctuality performance than the EK flights ex DXB that are then 'tag flights' across the Tasman.
There have more than 200,000 views of the various flight delays/ cancellations pages. As a moderator suggested some time back, if you don't like these pages, don't read them! Don't assume that every potential flight patron has your huge knowledge of whether airline X or airline Y is a preferable option. Punctuality and relative lack of cancellations is only one thing to consider, but for some, it is one of the more important parameters after the given of safety, as travellers may be on a tight business or even leisure schedule.
Although the official definition of 'late' is 'above 15 minutes', I generally only feature delays of half an hour or more, which cuts out quite a few delays from being featured.
There are some pages on this website that I might scratch my head at - priority boarding discussions is one example. as to me it smacks a bit of the 'do you know who I am?' attitude; whether hot dogs are served in the VA lounges may be another. However, on these types of websites, others have a right to discuss any subject provided the discussion remains civil, does not contravene the law of the land and preferably uses correct English. There is even a 'playground' forum for matters unrelated to aviation. Travellers have different needs, just as individuals differ, so why not respect that?