You are evidently of the mistaken view that Jehovah's Witnesses do not and are required to not speak to disfellowshipped persons. You are free to believe what you wish, but many spiritually-mature persons (e.g., elders and their wives) have conversations with disfellowshipped persons. I suppose it's possible that many of the things you believe to be true are not true at all.
Normally, a close relative would not be disfellowshipped for associating with a disfellowshipped person unless there is spiritual association or an effort made to justify or excuse the wrongful course." Pay Attention to Yourselves and all the Flock p.103
Conclusion: anyone having 'spiritual association' - which includes discussions on Biblical and religious topics - with a DFed person, set himself up to be DFed too.
Wt literature even claims saying 'hello' to a DFed person is an act of disobedience to God.
I'm also quite sure there has been at least one reference in JW literature that not even elders are to talk to DFed person unless the body of elders sent them on a mission, for example to try and reactivate the DFed person.
And here you are saying something like 'Elders do it so I can disobey Gods guidance too!'
Geez you don't even know the rules of your own cult.