Personally choosing not to label yourself or your sexuality does nothing to erase anyone else's identity.
Choosing not to label yourself or your sexuality does not equate to being bisexual/ sexualy fluid as those things are in and of themselves "labels".
We also don't need anyone's trust we are quite content just freely being our bisexual/fluid selves.
P.S: I think what we are seeing with Arad is what happens when someone is boxed into a label and the moment they deviate from said label the community and society at large freaks out.
Or he could just be a gay man open to as much financial opportunity that's available. It really could just be as simple as that.