Why can't all hunter pets become viable in all situations?

This is something I have been asking for since cata came out. We have pet talent points, now we have a brand new talent system. There are so many pets for hunters to collect but not all of them have that cat/wolf buff that your raid will always need.

The question is why can't pet buff benefits be part of the talent system? That way you can specify how you want a certain pet to buff a raid? This would allow players to raid with any pet they want! Imagine raiding with a nether ray or a beetle without getting kicked for not providing that buff the raid wants.

When I walk around SW every single hunter either has a cat or a spirit beast if they are BM. It makes me forget about things like sporebats, or silithids.

So why did blizzard not include beneficial pet buffs in its new pet talent system? Why are hunters still forced to use "cat or dog". :/

Source: http://www.mmo-champion.com/threads/1185663-Why-can-t-all-hunter-pets-become-viable-in-all-situations

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