If the question concerns the official Lucasfilm stance (if any), my guess is that they want the leeway or option to declare them apocryphal if some future project requires it, but that at the present they don't feel the need to do so.
As I understand it, they were dropped not because George Lucas decided Indy's life goes differently from what's depicted in the bookends, but simply because Lucas and the show's other makers (notably Rick McCallum) decided the segments simply didn't "work" as part of the narrative presentation (that is, all the stuff we see and hear onscreen). That doesn't mean they don't happen, but just that they're not part of the (current main version of the) show.
I think the segments are therefore considered part of the official canon, unless and until Lucas / Lucasfilm decides to specifically omit them from it for one reason or another - say, releasing an Indy story where Indy dies sometime prior to the early '90s, or lives to that point with two good eyes, or reaches that point without getting any new family members beyond Marion and Mutt.