Yeah, I kind of read it that way too. Dick isn't downplaying his own connection to Bruce, but he also probably realizes that Damian obsesses over the Wayne blood specifically because he never really had the opportunity to build any kind of relationship with Bruce the way the other kids did. The fact that he (may possibly) be his biological child is really all he has in the world at the moment, and Dick is past the point where his own insecurity in Bruce's love would prevent him from letting a ten year old kid cling to that a little bit. For now, anyway.