I think the dad is looking for a signed jersey or something.
This is what I though too, especially with the "my son waited all season" line, because the C's had already been in town on 11/23 and 12/25 (against the Knicks), and also on 10/13 and 10/15 (against the Knicks) during the preseason.
Some guy having to plan a trip months in advance because he has to fly halfway across the globe to see LeBron, only to have him sit out that game, ya I might feel sorry for him.
But when IT comes to your city 6x's per year (including preseason), and you act like a once in a lifetime opportunity was ruined because he sat out one of those games... Well I just think the dad was hoping to get some special IT attention (signed jersery, phone call, etc.). So far it looks like it backfired.