Why refusing customization is a fallacy

[Gilthas]

As OP said if you are not raiding it won't matter, when you DF it wont matter you will just continue the dungeon.

Let me repost this:

Having unbalanced jobs is bad for everyone. It's bad for the player that likes the job because he gets shunned from most parties, and it's bad for those who don't play the job, because they get stuck with an underperforming job in duties.

The argument that all jobs play the same is also pretty much a fallacy. Even if you're of the opinion that the current jobs in each role play the same (I disagree) adding specs won't change that, it'll just add more jobs that play the same.