It's a tough argument to say we have a strong bench when the players aren't playing. It's tough to argue that "when healthy..." when a quarter of the way through the season, we have yet to be at 100% for even one game. So I can understand the argument that our bench isn't among the strongest-the players aren't playing.
The bench we actually have seems to be mainly Nate, Q, and BBD.
Looking at that trio, it's a decent amount of talent, but perhaps a bit undersized and/or playing out of position quite a bit.
I'd say the Mavs, Orlando, and possibly the Lakers' bench look stronger than ours right now, and quite possibly also the Clippers and Suns as well.