Seems like it was a tv-movie about having a down's syndrome baby. It won a "Outstanding Individual Achievement in Religious Programming" at the Daytime Emmy's in 1978, so take of that from what you will.
I'm not really sure why he'd think that makes him look good - those are his old co-workers after all on that show. You'd think he'd be a bit more gracious about it, but he and his wife kind of comes off as a toxic twosome unfortunately.
I tend to think he was asked, but he probably assumed that this was going to be another Chabby in Paris / Last Blast thing on the DAYS app, so seeing it actually blow up must be a bit of a "oh [!@#$%^&*]" moment for him. He probably just thought he wasn't missing much, plus seeing his recast get such a great reception after nine years in the role has got to sting a bit. As others had said, he probably thought whoever stepped into the role was going to get Guy Wilson'd.