Since when has complaining about job 'homogenization' ever been an underrepresented viewpoint on these forums? This is hands down the most common complaint issued about job balance. You might as well follow-up with a statement of concern about the two minute meta.
The elephant in the room is that job homogenization only gets trotted out when players want to preserve a unique advantage that they have over others. Nobody cares about complete homogenization, which makes the same action available to everyone. Otherwise we'd see more complaints about the 'balance' around role actions and such.
The problem is partial homogenization, where you make a set of actions nearly identical, but then give one job an obvious unique advantage over all the others. WAR is probably the biggest offender in this regard, but we've seen others dominate across multiple expansions in this manner as well. Jobs that were grandfathered into an advantage are loathe to let it go.
If you want uniqueness, you have to be willing to accept unique weaknesses as well as strengths. But most people act on their own self-interest, rather than looking for a level playing field for everyone to compete on the basis of skill. You see something that you don't have, and the next expansion, you have to have it. Where's my Plunge? Where's my Cover? Where's my Divine Veil? It's an arms race. And that's why job design naturally converges over time. It just happens to preferentially converge faster in favor of the jobs with the loudest voices and the most players.