I would posit that it may be because of your statement in your previous comment about "something they can't control" and it is possible the person replying to you finds it relevant whether who their partners are is something they could control, which is consistent with a literal reading of their question, asking whether they can't control who their partners are.
I would posit that it may be because of your statement in your previous comment about "something they can't control" and it is possible the person replying to you finds it relevant whether who their partners are is something they could control, which is consistent with a literal reading of their question, asking whether they can't control who their partners are.