Come update BST will only get tier I, the same tier available on an item you get from a chest in Abyssea which you have on for one hit and remove god forbid, if you class that as such a bad thing does that mean you don't gear swap for WS' it's no different.
The point being SE finally did something right in giving BST's THF pets TH as it should have been, people complained "Wah! BST's in Dynamis are killing things too quickly in the lvl.75 Dynamis NERF NERF NERF" to which they went and did.
If DRG, PUP, SMN, WAR or DNC was a THF then I could understand where you're coming from, as it stands You have not a leg to stand on, basically you're argument is: BST got THF pets with TH, I want it for all my other jobs too, it's not fair! I don't care if none of these jobs are THF it's not fair, it's not fair.
Each job has different benefits, as an Example PUP, DRG and SMN has things BST should get. Will SE give it to them? No, of course they wont under the guise of lolBalance.