Yes, it's a question that by its wording asserts certain things to be true. The only possible 'loading' in, "So you think it's appropriate that---although alcohol is more deadly, more addictive, and more violence-inducing than marijuana---alcohol is legal while marijuana is illegal" is "alcohol is more deadly, more addictive, and more violence-inducing than marijuana." Do you disagree that alcohol is more deadly, more addictive, and more violence-inducing than marijuana?