Jorbles said there's not a druid deck that doesn't want it, not that there's not a druid player that doesn't want it. If you have a ramp/taunt druid variant, it probably wins a couple % more games if you put 1x Force 1x Roar into it, whether you like that or not. You probably don't need those couple %s because you're a great pilot. But that doesn't mean the deck itself doesn't want it.
I got to Black Knight Gadgetzan Druid February before last. From rank 10-5 or so I didn't use any Force Roar because Force Roar had little to do with the deck's theme. When I put 1x Force, 1x Roar in, almost to my dismay, the deck lost a few more games from drawing unaided Forces and won a few more games from drawing the combo, and the combo wins were outweighing the drags.
We're in the dark about what kind of deck it is, but it's either:
Mill druid, spell damage druid, leper gnome druid: 50% winrate is dependent on languishing in rank 15
Aggro Druid: 2 roars vastly improve the deck.
Midrange/token druid: 2 Roars and at least one force vastly improves the deck
Ramp/Taunt Druid: 1x force 1x roar slightly improves the deck's winrate, because sitting behind Sunwalkers while Ancient of Lore draws you cards, it's just gonna line up and steal games too many times.
There is no viable deck that doesn't want roar, but there are decks that don't need it.