I play almost exclusively Bard for progression and let me tell you- it would've been way harder to clear O4S the first few times with Black Mage.
It's not even close. The Minuet Troubadour for the Almagest right after Omega, the Paeon Troubadour for Neverwhere at 6 stacks and the refreshes+raid dps increases are incredibly clutch.
Someone got hit by emptiness before Light and Darkness? Have a Palisade and he'll live. Scholar is gonna deploy Adlo for an Almagest and something happened and we're not topped off? Let me Mine the Warrior. Someone with weakness for meteors? I'm at 5k MP, let me Foe real quick.
I have an unending love for Black Mage, but realistically I know I'm setting us all back if I play it most of the time, and I can't do it. I can't drag 7 people I consider my friends into failure for two more weeks because of the fact I love Black Mage.
And that feels bad (especially because I hate the swingy, rng nature of Bard). I can't just "not give a shit" about the friends I play with :/