I guess it is always a case of the grass being geener over the septic tank! I can see that being shouted at might seem preferable to no contact. I, on the other hand, yearned to be left alone if that was all still he wanted to do after all this time.
however, I do see your point. He is clearly a Dropout, rather than a droplet [my h] or a drop-in - one who can't leave the other alone.
They all have to go through this, and some, the strong ones, find they can do it without contact, not even to spew venom at us [and don't knock it till you have tried it!].
Actually I think it is horrible for everyone here. I can't see a single sitch that I think - they are having a 'better' time during their spouses MLC. But initially I didn't think that. I envied those whose h's were always around, but now, no. I really don't. We used to phone, email and text all the time as well. Now I would need a stiff drink to read an email from him.
Sorry I can't be more constructive, Snodderly will have good thoughts for you on the 'why' which might help to make it bearable.
