Titanforging/warforging was added/needed to keep content relevant all expansion long. Not becasue more gear than ever drops. People want to see power increases with new raids/ I 5 ilvl bump won't do it. As proof by the multiple threads here on on the official forums about how the minimal ilv increase from leveling to WQ, or how the other rewards not from M+/raiding are insignificant and not worth the effort. This has been known from day one pretty much.
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And I clearly remember people bitching about that back then too.