I wake up in the middle of the night screaming "Nero! What were you doing for 25 years?! WHAT!?"
So for the sake of getting a good night's rest, an explanation should have been provided.
Of course, this did put an end to the nightmares about zero...
Did you have similar problems when they didn't explain why Worf and Wesley were in Nemesis? Or when they didn't explain why Chekov was first officer on the Reliant?
In regards to Worf and Wesley in Nemesis, yes. But what's the problem with Chekov being the first officer of the Reliant?
What's wrong with Worf being the tactical officer of the Enterprise?