Been a while since playing FFXI eh? Drg has been a top dd for uh... 3 years? 4 years?
You're delusional. The only ones who think dragoons are good at anything are other dragoons. Before Abyssea, the top job was the infamous "Samurai bandwagon" by leaps and bounds. Before the two-handed weapon boost, you had your choice of Ninja, Monk, and Warrior for burn parties. And in Abyssea, I've yet to see one Dragoon even show up, let alone be a "top DD" *snicker*. There's nothing for them to do but stay home.
Dragoon was a joke job. All the pet jobs were. Puppetmaster was a mix of a no hit master with an unpredictable, fragile puppet on a 20 minute timer. Summoner was a slow MP hog that was bottom-of-the-barrel at any role it touched. Crappy damage, support abilities, and healing compared to every other job out there, and all on a useless 1 minute timer. It was so bad, people would get mad if summoners actually summoned something. Beastmaster was all but worthless if they couldn't find something to charm nearby (made worse with depoping mobs), and jug pets didn't last long enough. Dragoon went for years in various stages of suckitude. They started with their best weaponskill nerfed to ****, and half their damage was on a 2-hour timer which died at the first gob bomb. It's been a race to get out of last spot since.
Sure SE improved all the pet jobs over the years, but it's always been from a perspective of catching up to all the other steadily improving jobs. They're always playing catch-up, never able to outdo the others at anything.
You could have some kind of pet party (expect dragoon pets aren't "smart" enough to even handle that much), but it's a far cry from what real, pet-less players can do. People want ninjas and paladins to tank, black mages to nuke, white mages to heal. Pet jobs might sneak in an oddball role now and then, but that's about it.